CN116931644A

CN116931644A - Voltage regulating method and device

Info

Publication number: CN116931644A
Application number: CN202210334244.8A
Authority: CN
Inventors: 严翔
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2023-10-24
Also published as: WO2023185348A1

Abstract

The application provides a voltage regulating method and device, relates to the technical field of communication, and aims to improve the voltage regulating speed and ensure the service life of a load. The method is applied to a communication device, the communication device comprises a load and a power supply, and the method comprises the following steps: the power supply receives voltage indication information from the load, wherein the voltage indication information is used for indicating the target voltage of the load; when the absolute value of the difference between the output voltage of the power supply and the target voltage is larger than a preset voltage threshold, the power supply regulates the output voltage to a first voltage, wherein the regulating quantity is a first numerical value; when the absolute value of the difference between the first voltage and the target voltage is smaller than or equal to the preset voltage threshold, the power supply regulates the first voltage to the target voltage, wherein the regulating quantity is a second value; wherein the first value and the second value are not equal.

Description

Voltage regulating method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a voltage regulation method and apparatus.

Background

Currently, communication between two devices is achieved through MODEM (modulator and demodulator, MODEM) systems. The requirements of users on communication rates are different under different scenes, for example, in a scene requiring quick file transmission, the users can use the maximum rate of the fifth generation mobile communication technology (The fifth generation mobile communication technology, 5G) to transmit data, and the scene requires a MODEM system to adopt high-frequency high-voltage power supply; in the scene of web browsing or WeChat browsing, the requirement on the communication rate is low, the MODEM system can complete work only by adopting low frequency and low voltage, and if the MODEM system still adopts high frequency and high voltage power supply, the power consumption of the MODEM system is larger. Therefore, the voltage of the MODEM system can be adjusted by a dynamic voltage frequency scaling (dynamic voltage and frequency scaling, DVFS) technique to reduce the power consumption of the MODEM system. The voltage regulation in the DVFS technology is implemented by a power management unit (Power management unit, PMU). Two prior art regulation voltage schemes are described below in connection with fig. 1.

Scheme one: the PMU regulates the voltage each time in a fixed step (voltage value), for example, the fixed step may be 5mV, so that the voltage regulation process proceeds with a fixed slope until the target voltage is reached, which may also be referred to as linear regulation. Fig. 1 is a schematic diagram of a MODEM system, which includes a MODEM and a PMU, wherein the PMU may be used to power the MODEM, and the PMU includes a digital portion, a voltage regulation module, and a low dropout linear regulator (Low dropout regulator, LDO). Specifically, when the MODEM needs to adjust the voltage from V1 to V2, the MODEM notifies the PMU through a control interface connected to the PMU, after the PMU receives the voltage V2, the digital portion beats according to a clock, each beat outputs a code value corresponding to the voltage after the current voltage is adjusted by one step, for example, the digital portion outputs the code value M corresponding to the voltage after the voltage V1 is adjusted by 5mV, and the voltage adjusting module adjusts the reference voltage or the feedback resistor according to the code value M to change the output voltage of the LDO, and adjusts the output voltage of the LDO beat by beat until the output voltage of the LDO is adjusted to V2, so that the output voltage of the LDO is changed in a fixed step manner in each beat. Optionally, the PMU may also include a Buck converter circuit (Buck circuit) that may be used to output a voltage to power the MODEM system, only LDO shown in FIG. 1. FIG. 2 is a schematic diagram of a ramp voltage regulation, wherein curve S1 represents a voltage step-wise constant from V _L Is increased to V _H Curve S2 represents the voltage from V by means of a fixed step _H Reduced to V _L Is a process of (2). However, in this solution, in order to avoid overshoot or falling of the output voltage of the PMU exceeding the target voltage, the fixed step is generally smaller, for example, the fixed step may be 5mV, and when the voltage regulation amplitude is larger and the frequency of the digital part is fixed, the number of required voltage regulation steps is larger, resulting in longer time for voltage regulation and slow voltage regulation speed; on the other hand, if the digital part is raisedThe frequency of the voltage regulation is increased, but the power consumption consumed by the digital part is increased, and further, the power consumption of the voltage regulation is increased.

Scheme II: and once voltage regulation is performed, and the PMU directly regulates the output voltage of the LDO to the target voltage through once regulation. Specifically, when the MODEM needs to adjust the voltage from V1 to V2, the MODEM will notify the PMU through a control interface connected to the PMU, the digital part of the PMU directly outputs a code value corresponding to the target voltage, and the voltage adjusting module adjusts the reference voltage or the feedback resistor according to the code value corresponding to the target voltage, so that the LDO outputs the target voltage. FIG. 3 is a schematic diagram of one-time voltage regulation, wherein a curve S3 shows the voltage being regulated from V by one-time voltage regulation _L Is increased to V _H Curve S4 represents the voltage from V by means of one voltage regulation _H Reduced to V _L Is a process of (2). However, according to the technical scheme, the output voltage of the LDO is equal to the target voltage through one-time voltage regulation, so that overshoot or drop of the output voltage is large, the LDO needs a certain time to stabilize the output voltage, and extra time cost is increased; in addition, in the scene that the voltage regulation scope is big, the overshoot or drop of output voltage can be bigger, surpass the biggest voltage regulation value that the load can bear even, can influence the normal use of load and reduce the life of load.

Disclosure of Invention

The application provides a voltage regulating method and device, relates to the technical field of communication, and is used for balancing the voltage regulating speed and the service life of a load.

In order to achieve the above purpose, the application adopts the following technical scheme:

in a first aspect, a voltage regulation method is provided, applied to a communication device, where the communication device includes a load and a power source, and the method includes: the power supply receives voltage indication information from the load, wherein the voltage indication information is used for indicating the target voltage of the load; when the absolute value of the difference between the output voltage of the power supply and the target voltage is larger than a preset voltage threshold, the threshold voltage is the maximum voltage regulating difference which can be born by the load, and the power supply regulates the output voltage to a first voltage, wherein the regulating quantity is a first numerical value; when the absolute value of the difference between the first voltage and the target voltage is smaller than or equal to the preset voltage threshold, the power supply regulates the first voltage to the target voltage, wherein the regulating quantity is a second value; wherein the first value and the second value are not equal.

In the above technical solution, the power supply receives voltage indication information from the load, where the voltage indication information is used to indicate a target voltage of the load, when an absolute value of a difference between an output voltage of the power supply and the target voltage is greater than a preset voltage threshold, the power supply adjusts the output voltage to a first voltage, where an adjustment amount is a first value, when the absolute value of the difference between the first voltage and the target voltage is less than or equal to the preset voltage threshold, the power supply adjusts the first voltage to the target voltage, where the adjustment amount is a second value, where the first value and the second value are unequal, and optionally, the first value may be greater than the second value, that is, the power supply adjusts the output voltage of the power supply according to a maximum voltage regulation difference that the load can bear, and in an adjacent two voltage regulation processes, a previous voltage regulation value is greater than a next voltage regulation value, that is, in the voltage regulation process, the voltage regulation value gradually decreases, and the value or the drop value of the output voltage is guaranteed to be within a range that the load can bear, and compared with the current voltage regulation value, the current technology is improved, and the service life of the power supply is guaranteed.

In one possible implementation manner of the first aspect, the power supply regulates the output voltage to a first voltage, including: the power supply determines the first voltage according to the target voltage, the voltage regulating coefficient and the output voltage; the power supply regulates the output voltage to the first voltage.

In the possible implementation manner, the power supply determines the first voltage according to the target voltage, the voltage regulating coefficient and the output voltage, and regulates the output voltage to the first voltage, namely, the power supply regulates the output voltage of the power supply according to the maximum voltage regulating differential pressure which can be born by the load, so that the overshoot value or the dip value of the output voltage is ensured to be in the range which can be born by the load, the voltage regulating speed is improved, and the service life of the load is ensured.

In one possible implementation manner of the first aspect, the voltage regulation coefficient is greater than 0 and less than 1. Optionally, step (adjustment amount) v= (output voltage-target voltage) x voltage adjustment coefficient of each voltage adjustment, where the output voltage is the output voltage of the power supply after each voltage adjustment, during any two adjacent voltage adjustment processes except the last voltage adjustment (adjustment of the output voltage to the target voltage), the voltage adjustment coefficient is used to make the voltage adjustment value of the last time smaller than the voltage adjustment value of the previous time, that is, the voltage adjustment value is gradually reduced, so that when the last voltage adjustment is performed, the overshoot value or the drop value of the output voltage of the power supply is within the range that the load can bear, and the service life of the load is ensured.

In a possible implementation manner of the first aspect, the method further includes: when the absolute value of the difference between the first voltage and the target voltage is larger than the preset voltage threshold, the power supply regulates the first voltage to a second voltage, wherein the regulating quantity is a third value, and the third value is smaller than the first value; the power supply adjusts the second voltage to the target voltage through at least one adjustment according to the second voltage, the target voltage and the preset voltage threshold.

In the possible implementation manner, the output voltage of the power supply is adjusted from the first voltage to the target voltage through at least two voltage adjustments, and in the adjacent two voltage adjustment processes, the voltage adjustment value of the last time is smaller than the voltage adjustment value of the last time, so that the voltage adjustment value is gradually reduced in the whole voltage adjustment process, the overshoot value or the drop value of the output voltage of the power supply is ensured to be in the range which can be born by the load when the voltage adjustment speed is improved, and the service life of the load is ensured.

In a possible implementation manner of the first aspect, after the power supply adjusts the output voltage to the first voltage, the method further includes: the power supply waits for a preset time period; after the power supply regulates the first voltage to the second voltage, the method further includes: the power supply waits for the preset period of time.

In the possible implementation manner, the power supply has enough time to stabilize the output voltage, so that the quality of the output voltage is ensured.

In a possible implementation manner of the first aspect, before the power supply regulates the output voltage to the first voltage, the method further includes: when the absolute value of the difference between the output voltage of the power supply and the target voltage is smaller than or equal to a preset voltage threshold, the power supply regulates the output voltage to the target voltage.

In the above possible implementation manner, when the absolute value of the difference between the output voltage of the power supply and the target voltage is smaller than or equal to the preset voltage threshold, the power supply directly adjusts the output voltage of the power supply to the target voltage according to the maximum voltage regulation differential that the load can bear, so that the voltage regulation speed is improved while the load voltage requirement is met.

In a possible implementation manner of the first aspect, the load includes at least one of: MODEM processor, application processor, accelerator.

In the possible implementation manner, the voltages required by the load in different scenes are different, and the output voltage of the power supply is adjusted to enable the load to receive different output voltages, so that the power consumption of the load is reduced while the normal operation of the load is ensured.

In a second aspect, there is provided a voltage regulating device comprising: a receiving unit configured to receive voltage indication information from the load, the voltage indication information being configured to indicate a target voltage of the load; the adjusting unit is used for adjusting the output voltage to a first voltage when the absolute value of the difference value between the output voltage of the power supply and the target voltage is larger than a preset voltage threshold value, wherein the adjusting quantity is a first numerical value; the adjusting unit is further configured to adjust the first voltage to the target voltage when an absolute value of a difference between the first voltage and the target voltage is less than or equal to the preset voltage threshold, where the adjustment amount is a second value; wherein the first value and the second value are not equal.

In a possible implementation manner of the second aspect, the adjusting unit is specifically further configured to; and determining the first voltage according to the target voltage, the voltage regulating coefficient and the output voltage, and regulating the output voltage to the first voltage. Alternatively, the step (adjustment amount) v= (output voltage-target voltage) ×voltage adjustment coefficient of the voltage adjustment.

In a possible implementation manner of the second aspect, the voltage regulation coefficient is greater than 0 and less than 1.

In a possible implementation manner of the second aspect, the adjusting unit is further configured to: when the absolute value of the difference between the first voltage and the target voltage is larger than the preset voltage threshold, the first voltage is regulated to a second voltage, wherein the regulating quantity is a third numerical value, and the third numerical value is smaller than the first numerical value; and adjusting the second voltage to the target voltage through at least one adjustment according to the second voltage, the target voltage and the preset voltage threshold.

In a possible implementation manner of the second aspect, the adjusting unit is further configured to: after the output voltage is regulated to the first voltage, waiting for a preset time period; after the first voltage is adjusted to the second voltage, waiting for the preset time period.

In a possible implementation manner of the second aspect, the load includes at least one of the following: MODEM, application processor, accelerator.

In a third aspect, there is provided a communication device comprising a load and a power supply for powering the load, the power supply being as described above with respect to the second aspect or any one of the possible implementations of the second aspect.

In a further aspect of the application, a computer-readable storage medium is provided, comprising computer instructions which, when run on a voltage regulating device, perform the relevant steps in the method embodiments described above.

In a further aspect of the application, a computer program product is provided comprising instructions which, when run on a computer device, cause a voltage regulating device to perform the relevant steps in the method embodiments described above.

It will be appreciated that the voltage regulating device, the computer readable storage medium and the computer program product provided above may be used to perform the corresponding methods provided above, and thus, the advantages achieved by the voltage regulating device and the computer readable storage medium may refer to the advantages in the corresponding methods provided above, and will not be described herein.

Drawings

Fig. 1 is a schematic structural diagram of a MODEM system;

FIG. 2 is a schematic diagram of a ramp voltage regulator;

FIG. 3 is a schematic diagram of a primary pressure regulator;

fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 5 is a flowchart of a voltage adjustment method according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a nonlinear voltage regulation according to an embodiment of the present application;

FIG. 7 is a flowchart of another voltage adjustment method according to an embodiment of the present application;

FIG. 8 is a schematic waveform diagram of nonlinear voltage regulation and linear voltage regulation under different voltage regulation coefficients according to an embodiment of the present application;

Fig. 9 is a schematic structural diagram of a voltage regulator according to an embodiment of the present application.

Detailed Description

In the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a. b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural. In addition, the embodiments of the present application use words such as "first," "second," etc. to distinguish between the same item or similar items that have substantially the same function and effect. For example, the first threshold and the second threshold are merely for distinguishing between different thresholds, and are not limited in order. Those skilled in the art will appreciate that the words "first," "second," and the like do not limit the number and order of execution.

In the present application, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The embodiment of the application provides a voltage regulating method and a device, which are applied to communication equipment comprising a load and a power supply, wherein the voltage regulating method is a nonlinear voltage regulating method, in the method, the power supply can regulate the output voltage of the power supply to the target voltage through multiple voltage regulation according to the target voltage of the load, the power supply regulates the output voltage of the power supply according to the maximum voltage regulation differential pressure which can be born by the load, in the rest of any adjacent two voltage regulation processes except the last voltage regulation (regulating the output voltage to the target voltage), the voltage regulation value of the last time is larger than the voltage regulation value of the last time, the voltage regulation value is gradually reduced, the overshoot value or the falling value of the output voltage of the power supply is in the range which can be born by the load in the last voltage regulation, compared with the prior art, the voltage regulation (the voltage regulation time length and the speed are equal) and the overshoot value or the falling voltage regulation (the voltage regulation time is slow) are respectively) through one time or more, the voltage regulation (the voltage regulation differential pressure of the maximum which can bear by the load is greatly reduced, the service life of the load is prolonged, and the voltage regulation differential pressure is prolonged compared with the service life is guaranteed.

The structure of the communication device will be described below. The communication device may include a terminal device, for example, the terminal device may include, but is not limited to, a personal computer, a server computer, a mobile device (e.g., a cell phone, a tablet, a media player, etc.), a wearable device, an in-vehicle device, a consumer terminal device, a mobile robot, a drone, and the like.

Fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application, where the communication device is illustrated by using a mobile phone as an example. As shown in fig. 4, the communication device may include: a power source 101, a processor 102, a memory 103, a sensor assembly 104, a multimedia assembly 105, and an input-output interface 106.

Where the power source 101 is operable to provide power to various components of the communication device, the power source 101 may include a power management system, one or more power sources, or other components associated with the communication device generating, managing, and distributing power. In an embodiment of the application, the power supply 101 may include a power management unit (Power management unit, PMU) that may include a digital section, a voltage regulation module, and a low dropout linear regulator (Low dropout regulator, LDO). The PMU may be used to regulate the output voltage of the power supply 101, for example, the voltage regulation module of the PMU may regulate the reference voltage or the feedback resistor according to the voltage code value of the output of the digital part, so as to change the output voltage of the LDO, thereby regulating the output voltage of the power supply 101. Optionally, the PMU may also include a Buck converter circuit (Buck circuit) that may be used to output a voltage. I.e., the PMU may choose to use the LDO output voltage or use the buck converter circuit output voltage.

The processor 102 is a control center of the communication device, and connects various parts of the entire device using various interfaces and lines, for example, the processor 102 may be connected to the power supply 101 through the interfaces, and the processor 102 performs various functions of the terminal device and processes data by running or executing software programs and/or software modules stored in the memory 103, and calling data stored in the memory 103, thereby performing overall monitoring of the communication device. Optionally, the processor 102 may include one or more processing units, for example, the processor 102 may include a central processing unit (central processing unit, CPU), a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor and/or a neural network processor (neural-network processing unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors. In an embodiment of the present application, the processor 102 may include: high power consumption modules such as MODEM (modulator and demodulator, MODEM) processor, application processor (application processor, AP) and accelerator.

Memory 103 may be used to store data, software programs, and software modules; the device mainly comprises a storage program area and a storage data area, wherein the storage program area can store an operating system and application programs required by at least one function, such as a sound playing function or an image playing function; the storage data area may store data created according to the use of the terminal device, such as audio data, image data, or table data. In addition, the communication device may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The sensor assembly 104 includes one or more sensors for providing status assessment of various aspects for the terminal device. The sensor assembly 104 may include an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor, among others, and acceleration/deceleration of the terminal device, azimuth, on/off state, relative positioning of the assembly, or temperature change of the terminal device may be detected by the sensor assembly 104. The sensor assembly 104 may further include a light sensor, and the sensor assembly 104 may further include a light sensor for detecting light of the surrounding environment.

The multimedia component 105 provides a screen of an output interface between the terminal device and the user, which may be a touch panel, and when the screen is a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In addition, the multimedia assembly 105 may include at least one camera, for example, the multimedia assembly 105 may include a front-facing camera and/or a rear-facing camera. The front camera and/or the rear camera may receive external multimedia data when the terminal device is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The input/output interface 106 provides an interface between the processor 102 and a peripheral interface module, such as a keyboard, mouse, or universal serial bus (universal serial bus, USB) device, etc.

Although not shown, the communication device may further include an audio component and a communication component, for example, the audio component includes a microphone, and the communication component includes a wireless fidelity (wireless fidelity, wiFi) module or a bluetooth module, etc., which are not described herein. Those skilled in the art will appreciate that the communication device structure shown in fig. 4 is not limiting of the communication device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.

In the communication device shown in fig. 4, the power source 101 may be used to power the processor 102, the memory 103, the sensor assembly 104, and the multimedia assembly 105, and thus, the processor 102, the memory 103, the sensor assembly 104, and the multimedia assembly 105 may each be referred to as a load with respect to the power source 101.

The voltage adjustment method provided by the embodiment of the present application is described in detail below based on the communication device shown in fig. 4.

Fig. 5 is a flowchart of a voltage adjustment method according to an embodiment of the present application, where the method includes:

s501: the power supply receives voltage indication information from the load, the voltage indication information being used to indicate a target voltage of the load.

Wherein the load may comprise a module or component of the communication device that needs to be powered. Alternatively, the load may be a module or component with greater power consumption, for example, the load may comprise a processor in the communication device, which may include at least one of: MODEM processor, application processor, accelerator, etc.

Second, the target voltage is the voltage that the load needs in a certain scenario. For example, the target voltage may be a voltage required by the load in a high communication rate scenario, or the target voltage may be a voltage required by the load in a low communication rate scenario. In a high communication rate scenario, the load is in a high frequency working state, and a high voltage is required by the load, and at this time, the target voltage is a high voltage. In contrast, in the low communication rate scenario, the load is in a low frequency operation state, and in order to save power consumption, the supply voltage of the load needs to be adjusted to a low voltage that meets the load demand, and at this time, the target voltage is a low voltage.

In an embodiment of the present application, the scenario includes, but is not limited to: physical downlink control channel (physical downlink control channel, PDCCH), physical downlink shared channel (physical downlink shared channel, PDSCH), multicarrier unit (component carrier, CC), single CC, large and small bandwidth scenarios, and so on.

S502a: when the absolute value of the difference between the output voltage of the power supply and the target voltage is larger than a preset voltage threshold, the power supply adjusts the output voltage to a first voltage, wherein the adjusting quantity is a first value.

The output voltage in S502a is the output voltage of the power supply before the voltage regulation, that is, the output voltage in S502a is the initial voltage of the power supply. In the following embodiment, the output voltage in S502a is taken as an initial voltage as an example.

In addition, the target voltage may be greater than the initial voltage, and the target voltage may be less than the initial voltage. For example, the target voltage is 10 millivolts (mV), the initial voltage may be 5mV,10mV is greater than 5mV, and the target voltage is greater than the initial voltage; alternatively, the target voltage is 8mV, the initial voltage may be 12mV,8mV is less than 12mV, and the target voltage is less than the initial voltage.

Second, the preset voltage threshold may be the maximum voltage regulation differential that the load can withstand, and the preset voltage threshold may also be referred to as an overshoot value or a dip value. Wherein, the overshoot value is that the power supply outputs the voltage from the low voltage V _L Regulated to a high voltage V _H When exceeding the high voltage V _H Voltage value of (2); the drop value is that the power supply outputs voltage from high voltage V _H Regulated to a low voltage V _L When exceeding the low voltage V _L Is a voltage value of (a). The overshoot value and the droop value may be the same or different in the same load. It should be noted that, different loads correspond to different preset voltage thresholds, for example, the preset voltage threshold corresponding to the MODEM processor may be 5mV, and the preset voltage threshold corresponding to the application processor may be 10mV. The preset voltage threshold may be set according to actual requirements and experience of related staff, which is not particularly limited in the embodiment of the present application.

In a first possible embodiment, the power supply regulates the output voltage to a first voltage, comprising: the power supply determines an adjustment amount according to the initial voltage, the target voltage and the voltage adjustment coefficient, and determines the first voltage according to the adjustment amount; the power supply regulates the output voltage from the initial voltage to the first voltage.

Wherein the voltage regulating coefficient is more than 0 and less than 1. The voltage regulation factor may be 1/N, where N is a positive integer greater than 1, for example, the voltage regulation factor may be 1/2, 1/3, 2/3, 1/4, or 1/5. The voltage regulation factor may also be referred to as a nonlinear voltage regulation factor. Specifically, the voltage regulation coefficient can be set according to the LDO loop parameter, the requirement of the load on the voltage quality and the speed of voltage regulation. The embodiment of the present application is not particularly limited thereto.

Specifically, the determining, by the power supply, the adjustment amount according to the initial voltage, the target voltage, and the adjustment coefficient includes: and determining a difference between the initial voltage and the target voltage, determining the adjustment amount according to a product of the difference and the adjustment coefficient, determining the first voltage according to a sum of the initial voltage and the adjustment amount, and adjusting the output voltage from the initial voltage to the first voltage.

Optionally, the power supply may further perform voltage regulation according to a set array, where each number in the set array is a regulating variable of the power supply during each voltage regulation. Wherein, the back one of any adjacent two numbers in the array is smaller than the front one, and the difference value between the back one and the front one can be equal.

In the following embodiments, the power supply adjusts the output voltage of the power supply according to the initial voltage, the target voltage and the voltage adjustment coefficient.

Since the target voltage may be greater than the initial voltage, the target voltage may be less than the initial voltage, and the process of adjusting the output voltage by the power supply will be described below in both cases.

In a first possible embodiment, the target voltage is greater than the initial voltage, and the power supply increases the output voltage to regulate the output voltage from the initial voltage to a first voltage.

In a second possible embodiment, the target voltage is less than the initial voltage, and the power supply decreases the output voltage to regulate the output voltage from the initial voltage to the first voltage.

A specific procedure for the power supply to regulate the first voltage will be described below. Specifically, the power supply compares the initial voltage with the target voltage to obtain a value a, wherein the value a is an absolute value of a difference between the initial voltage and the target voltage, the power supply compares the value a with the preset voltage threshold, and when the value a is greater than the preset voltage threshold, the power supply regulates the output voltage from the initial voltage to the first voltage.

For example, taking the initial voltage V0 as 8mV, the target voltage Vt as 20mV, the preset voltage threshold as 6mV, the voltage regulation coefficient as 2/3 as an example, the absolute value of the difference between the initial voltage and the target voltage is a value a, and the value a satisfies the formula (1):

A＝|8mV-20mV|＝12mV (1)

the power supply compares the value a with the preset voltage threshold, and since 12mV is greater than 6mV, the power supply adjusts the output voltage from the initial voltage to a first voltage V1, the first voltage V1 satisfying formula (2):

at this time, the adjustment amount is an absolute value of a difference between the initial voltage and the first voltage output by the power supply, that is, the absolute value of the difference between the initial voltage and the first voltage is a first value D1, and the first value D1 satisfies formula (3):

D1＝|8mV-16mV|＝8mV (3)

S503a: when the absolute value of the difference between the first voltage and the target voltage is smaller than or equal to the preset voltage threshold, the power supply regulates the first voltage to the target voltage, wherein the regulating quantity is a second value; wherein the first value and the second value are not equal.

Wherein the first value and the second value being unequal may include: the first value may be greater than the second value, and the first value may be less than the second value. These two cases will be described below.

In a first possible embodiment, the first value is greater than the second value. Specifically, the power supply compares the first voltage with the target voltage to obtain a value B, where the value B is an absolute value of a difference between the first voltage and the target voltage, and the value B satisfies formula (4):

B＝|16mV-20mV|＝4mV (4)

the power supply compares the value B with the preset voltage threshold, and since the value B is smaller than the preset voltage threshold, the power supply adjusts the output voltage from the first voltage V1 to a target voltage Vt, which is equal to 20mV. At this time, the adjustment amount is the absolute value of the difference between the first voltage V1 and the target voltage Vt, that is, the absolute value of the difference between the first voltage V1 and the target voltage Vt is the second value D2, and the first value D2 satisfies the formula (5):

D2＝|16mV-20mV|＝4mV (5)

Wherein the first value D1 is greater than the second value D2.

In this embodiment, the power supply adjusts the output voltage of the power supply according to the maximum voltage regulation differential pressure that the load can bear, and in the adjacent two voltage regulation processes, the previous voltage regulation value is greater than the last voltage regulation value, that is, in the whole voltage regulation process, the voltage regulation value gradually decreases, so that when the voltage is regulated for the last time, the overshoot value or the drop value of the output voltage of the power supply is ensured to be in the range that the load can bear, and the service life of the load is ensured while the voltage regulation speed is improved.

In a second possible embodiment, the first value D1 is smaller than the second value D2. In this embodiment, the power supply adjusts the output voltage of the power supply according to the maximum voltage regulation differential pressure that the load can bear, so as to ensure that the overshoot value or the drop value of the output voltage of the power supply is in the range that the load can bear when the voltage is regulated for the last time, and ensure the service life of the load while improving the speed of voltage regulation.

In another possible embodiment, after the regulating unit regulates the output voltage to the first voltage, the method may further include S503b: when the absolute value of the difference between the first voltage and the target voltage is larger than the preset voltage threshold, the power supply regulates the first voltage to a second voltage, wherein the regulating quantity is a third value, and the third value is smaller than the first value; the power supply adjusts the second voltage to the target voltage through at least one adjustment according to the second voltage, the target voltage and the preset voltage threshold. S503b is not shown in fig. 5.

Wherein the at least one adjustment may include: one adjustment and multiple adjustments. These two cases will be described below.

In a first possible embodiment, the at least one adjustment comprises only one adjustment, i.e. the absolute value of the difference between the second voltage and the target is less than or equal to the preset voltage threshold, and the power supply can directly adjust the second voltage to the target voltage in a similar manner as S503a described above. In the embodiment, the power supply adjusts the output voltage of the power supply according to the maximum voltage regulation difference which can be borne by the load, and in the adjacent two voltage regulation processes except the last voltage regulation (the second voltage is regulated to be the target voltage), the former regulation amount is larger than the latter regulation amount, so that the voltage regulation speed is improved; on the other hand, the power supply adjusts the output voltage of the power supply according to the maximum voltage regulating differential pressure which can be born by the load so as to enable the power supply to output the target voltage, thereby enabling the overshoot value or the drop value of the target voltage output by the power supply to be in the range which can be born by the load and ensuring the service life of the load.

In a second possible embodiment, the at least one adjustment may comprise a plurality of adjustments, wherein in the plurality of adjustments the last pressure adjustment process corresponds to the pressure adjustment process described in S503a, and each other pressure adjustment process except the last pressure adjustment process is similar to the pressure adjustment process described in S502a-503b above. In the embodiment, the power supply adjusts the output voltage of the power supply according to the maximum voltage regulation differential pressure which can be borne by the load, and in any two adjacent voltage regulation processes except the last voltage regulation, the former regulation quantity is larger than the latter regulation quantity, so that the voltage regulation speed is improved; on the other hand, the power supply adjusts the output voltage of the power supply according to the maximum voltage regulating differential pressure which can be born by the load so as to enable the power supply to output the target voltage, thereby enabling the overshoot value or the drop value of the target voltage output by the power supply to be in the range which can be born by the load and ensuring the service life of the load.

In the voltage regulation process described in steps S502a-503b, step G (regulation amount) of each voltage regulation satisfies formula (6), and output voltage V of each voltage regulation satisfies formula (7):

g= (target voltage-output voltage) ×voltage regulation coefficient (6)

V=output voltage+g (7)

And secondly, the output voltage is the output voltage after the power supply completes voltage regulation every time, and before the voltage regulation is not started, the output voltage is the initial voltage of the power supply.

Fig. 6 is a schematic diagram of nonlinear voltage regulation provided in the embodiment of the present application, wherein the voltage regulation coefficient is denoted as a, the nonlinear voltage regulation is illustrated in fig. 6 when a is 1/2, the nonlinear voltage regulation is illustrated in fig. 6 when a is 1/3, and the nonlinear voltage regulation is illustrated in fig. 6 when a is 1/4. As shown in fig. 6 (a), a curve S1 indicates that the power supply will be at a low voltage V _L Regulated to a high voltage V _H Is shown, curve S2 shows the power supply will be at a high voltage V _H Regulated to a low voltage V _L The former voltage regulation step is larger than the latter voltage regulation step in the curves S1 and S2, and in any other adjacent two voltage regulation steps except the last voltage regulation, the former voltage regulation step is larger than the latter voltage regulation step. As shown in fig. 6 (b), curve S3 represents that the power supply will be at a low voltage V _L Regulated to a high voltage V _H Is shown, curve S4 shows the power supply will be at a high voltage V _H Regulated to a low voltage V _L The number of times of voltage regulation in the curve S3 and the number of times of voltage regulation in the curve S4 are respectively larger than the number of times of voltage regulation in the curve S1 and the number of times of voltage regulation in the curve S2. As shown in FIG. 6 (c), curve S5 represents the power supply going to a low voltage V _L Regulated to a high voltage V _H Is shown, curve S6 represents the power supply will be at a high voltage V _H Regulated to a low voltage V _L The number of times of voltage regulation in the curve S5 and the number of times of voltage regulation in the curve S6 are respectively larger than the number of times of voltage regulation in the curve S3 and the number of times of voltage regulation in the curve S4. As can be seen from fig. 6, the larger the voltage adjustment coefficient a, the smaller the number of required voltage adjustments, whereas the smaller the voltage adjustment coefficient a, the larger the number of required voltage adjustments.

Furthermore, the power supply can wait for a certain preset time period after each voltage regulation is finished. Optionally, the preset time length of the power supply waiting after each voltage regulation is equal, that is, the interval time of each voltage regulation is equal. Illustratively, after the power supply adjusts the output voltage from the initial voltage to the first voltage, the power supply waits for a first preset time period t1 for performing a second voltage adjustment; after the power supply adjusts the output voltage from the first voltage to the second voltage, the power supply waits for a second preset time period t2 to perform third voltage adjustment, wherein the first preset time period t1 and the second preset time period t2 are equal. The preset time period is related to the frequency of the digital part in the power supply, and can be specifically set according to actual requirements and experience of related staff.

In yet another possible embodiment, after S501, the method may further include S502b: when the absolute value of the difference between the target voltage and the output voltage is smaller than or equal to the preset voltage threshold, the power supply directly regulates the output voltage to the target voltage. S502b is not shown in fig. 5. That is, when the absolute value of the difference between the target voltage and the initial voltage is smaller than or equal to the preset voltage threshold, the power supply directly regulates the initial voltage to the target voltage through one voltage regulation. In this embodiment, the power supply adjusts the initial voltage according to the maximum voltage regulation difference that the load can bear, so that the power supply outputs the target voltage, and therefore, the overshoot value or the dip value of the target voltage output by the power supply is within the range that the load can bear, and the service life of the load is ensured.

In order to facilitate understanding, the present technical solution will be described below by taking the flowchart shown in fig. 7 as an example. In fig. 7, the initial voltage is V0, the target voltage is Vt, the preset voltage threshold is M, and the waiting time for each voltage adjustment is t. S1: comparing whether the absolute value of the difference between the target voltage Vt and the initial voltage V0 is greater than a preset voltage threshold M, when the absolute value of the difference between the target voltage Vt and the initial voltage is less than or equal to the preset voltage threshold M (i.e., no), executing S2, and when the absolute value of the difference between the target voltage Vt and the initial voltage V0 is greater than the preset voltage threshold M (i.e., yes), executing S3; s2: regulating the output voltage from the initial voltage V0 to a target voltage Vt; s3: regulating the output voltage from the initial voltage V0 to a first voltage V1, waiting for a time t and performing S4; s4: comparing whether the absolute value of the difference between the first voltage V1 and the target voltage Vt is greater than a preset voltage threshold M, executing S5 when the absolute value of the difference between the first voltage V1 and the target voltage Vt is less than or equal to the preset voltage threshold M (i.e., no), and executing S6 when the absolute value of the difference between the first voltage V1 and the target voltage Vt is greater than the preset voltage threshold M (i.e., yes); s5: regulating the output voltage from the first voltage V1 to a target voltage Vt; s6: regulating the output voltage from the first voltage V1 to a second voltage V2, waiting for a time t and executing S7; s7: comparing whether the absolute value of the difference between the second voltage V2 and the target voltage Vt is greater than a preset voltage threshold M, executing S8 when the absolute value of the difference between the second voltage V2 and the target voltage Vt is less than or equal to the preset voltage threshold M (i.e., no), and executing S9 when the absolute value of the difference between the second voltage V2 and the target voltage Vt is greater than the preset voltage threshold M (i.e., yes); s8: regulating the output voltage from the second voltage V2 to a target voltage Vt; s9: regulating the output voltage from the second voltage V2 to a third voltage V3, waiting for a time t and performing the similar operations described above up to Sn; sn: comparing whether the absolute value of the difference between the nth voltage Vn (i.e. the output voltage after the nth voltage adjustment) and the target voltage Vt is greater than a preset voltage threshold M, and executing So when the absolute value of the difference between the nth voltage Vn and the target voltage Vt is less than or equal to the preset voltage threshold M (i.e. no); so: the output voltage is adjusted from the nth voltage Vn to the target voltage Vt.

Fig. 8 is a schematic diagram of waveforms of nonlinear voltage regulation and linear voltage regulation under different voltage regulation coefficients, in fig. 8, the initial voltage V0 is 650mV, the target voltage Vt is 850mV, the waiting time t of each voltage regulation is 1us, the maximum voltage regulation differential pressure that can be born by a load is 5mV, the voltage regulation coefficient a is 1/2, 1/3, 1/4, 1/5, and the linear voltage regulation fixed step is 5 mV. Wherein the abscissa represents the voltage regulation time (microseconds/. Mu.s) and the ordinate represents the output voltage (mV) of the power supply. Wherein, the curve S1 represents the nonlinear voltage regulation trend when the voltage regulation coefficient a is 1/2, and the voltage regulation time for the power supply to regulate the output voltage from 650mV to 850mV in the curve S1 is 7 mu S; curve S2 shows the nonlinear voltage regulation trend with a voltage regulation factor a of 1/3, and the voltage regulation time for the power supply to regulate the output voltage from 650mV to 850mV in curve S2 is 11 mus; curve S3 shows the nonlinear voltage regulation trend with a voltage regulation factor a of 1/4, and the voltage regulation time for the power supply to regulate the output voltage from 650mV to 850mV in curve S3 is 14 mus; curve S4 is a nonlinear voltage regulation trend with a voltage regulation coefficient a of 1/5, and the voltage regulation time for the power supply to regulate the output voltage from 650mV to 850mV in curve S4 is 18 μs; curve S5 shows the linear voltage regulation trend at a fixed step, and the voltage regulation time for the power supply to regulate the output voltage from 650mV to 850mV in curve S5 is 40 mus. As can be seen from fig. 9, the curves S1, S2, S3 and S4 are all large in the early-stage voltage regulation step, small in the later-stage voltage regulation step, and the larger the voltage regulation coefficient is, the smaller the number of times of voltage regulation is, and the shorter the required voltage regulation time is; in addition, the voltage regulating time required by the nonlinear voltage regulating is far smaller than that required by the linear voltage regulating, for example, compared with the linear voltage regulating, the voltage regulating speed is increased by 82.5% when the voltage regulating coefficient is 1/2, the voltage regulating speed is increased by 72.5% when the voltage regulating coefficient is 1/3, the voltage regulating speed is increased by 65% when the voltage regulating coefficient is 1/4, and the voltage regulating speed is increased by 55% when the voltage regulating coefficient is 1/5.

Optionally, in the nonlinear voltage regulation, the step of the early voltage regulation is large, and the step of the later voltage regulation is small, i.e. the voltage regulation value can be larger than the preset voltage threshold value in the early stage of voltage regulation. As shown in the curve S1 in fig. 8, the step G of the first voltage regulation satisfies the formula (6), the step G is 100mV, the power supply regulates the output voltage from the initial voltage 650mV to 750mV, at this time, the step G100mV is greater than the preset voltage threshold 5mV, and because the target voltage Vt is 850mV, when the step G is greater than the preset voltage threshold, even if the output voltage of the power supply has a larger overshoot value or a drop value, the output voltage is far smaller than the target voltage, i.e. the output voltage of the power supply is within the range that the load can withstand, so that the service life of the load is not damaged. Along with the increase of the voltage regulating times, the voltage regulating step in the later stage is smaller and smaller, and when the output voltage is closer to the target voltage, the voltage regulating step is smaller, so that the power supply can be regulated according to the maximum voltage regulating pressure difference which can be born by the load, and the service life of the load is ensured.

In another possible embodiment, assuming that the time taken for the nonlinear voltage regulation and the linear voltage regulation are the same, the nonlinear voltage regulation requires less voltage regulation to regulate the output voltage to the target voltage than the linear voltage regulation requires to regulate the output voltage to the target voltage. The number of times of voltage regulation needed by the linear voltage regulation of fixed stepping is 40 times; the voltage regulating frequency required by the nonlinear voltage regulation is 7 times when the voltage regulating coefficient is 1/2, and compared with the linear voltage regulating clock frequency, the frequency can be reduced by 82.5%; the voltage regulating frequency required by the nonlinear voltage regulation is 11 times when the voltage regulating coefficient is 1/3, and compared with the linear voltage regulating clock frequency, the frequency can be reduced by 72.5%; the voltage regulating frequency required by the nonlinear voltage regulation is 14 times when the voltage regulating coefficient is 1/4, and compared with the linear voltage regulating clock frequency, the frequency can be reduced by 65%; the voltage regulating frequency required by the nonlinear voltage regulation is 18 times when the voltage regulating coefficient is 1/5, and compared with the linear voltage regulating clock frequency, the frequency can be reduced by 55%. Because the power consumption and the clock frequency are in a direct proportion, reducing the clock frequency of the PMU digital part is equivalent to reducing the power consumption of the PMU digital part, namely reducing the power consumption of voltage regulation.

In the embodiment of the application, the power supply receives the voltage indication information of the load, the voltage indication information is used for indicating the target voltage of the load, the power supply regulates the initial voltage output by the power supply to the target voltage through at least two times of voltage regulation according to the target voltage of the load, a preset voltage threshold and the initial voltage of the power supply, in the two adjacent times of voltage regulation, the voltage regulation value of the last time is smaller than the voltage regulation value of the last time, the power supply regulates the output voltage of the power supply according to the maximum voltage regulation pressure difference which can be born by the load, the voltage regulation value is gradually reduced, the overshoot value or the drop value of the output voltage is ensured to be in the range which can be born by the load, compared with the prior art, the power supply has the advantages that the overshoot value or the drop value of the output voltage is equal to each time, the voltage consumption time is long and the speed is slow, and the service life of the load is reduced by one time voltage regulation (the overshoot or the drop value of the output voltage is larger, and even the service life of the load is prolonged).

It will be appreciated that the voltage regulating device, in order to achieve the above-described functions, comprises corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the present application may be implemented in hardware or a combination of hardware and computer software in connection with the exemplary voltage regulation method steps described in connection with the embodiments herein. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application can divide the voltage regulating device into the functional modules according to the method example, for example, each functional module can be divided corresponding to each function, and two or more functions can be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

Fig. 9 shows a possible structural diagram of a voltage regulating device according to the above embodiment, in the case of dividing the respective functional modules with the respective functions, the voltage regulating device comprising: a receiving unit 101 and an adjusting unit 102. The receiving unit 101 is configured to support the voltage regulating device to perform S501 in the method embodiment described above; the adjusting unit 102 is configured to support the voltage adjusting device to perform one or more steps of S502 and S503 in the above-described method embodiment.

In a hardware implementation, the receiving unit 101 may be a digital part of the power supply shown in fig. 4, and the adjusting unit 102 may be a voltage adjusting module of the power supply shown in fig. 4. For a specific description of the power supply, reference may be made to the specific description in fig. 4, and the embodiments of the present application will not be described herein.

It should be noted that, all relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein. The device provided by the embodiment of the application is used for executing the corresponding functions in the embodiment, so that the same effects as the control method can be achieved.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or partly contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing an apparatus to perform all or part of the steps of the method described in the various embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

In another aspect of the present application, a communication device is provided, the communication device comprising a load and a power supply for powering the load, the power supply being adapted to perform the relevant steps of the method embodiments described above, the power supply being the power supply provided in fig. 4 and 5 described above.

Finally, it should be noted that: the foregoing is merely illustrative of specific embodiments of the present application, and the scope of the present application is not limited thereto, but any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A voltage regulation method for use in a communication device, the communication device including a load and a power source, the method comprising:

the power supply receives voltage indication information from the load, wherein the voltage indication information is used for indicating the target voltage of the load;

when the absolute value of the difference between the output voltage of the power supply and the target voltage is larger than a preset voltage threshold, the power supply adjusts the output voltage to a first voltage, wherein the adjusting quantity is a first numerical value;

when the absolute value of the difference between the first voltage and the target voltage is smaller than or equal to the preset voltage threshold, the power supply regulates the first voltage to the target voltage, wherein the regulating quantity is a second value;

Wherein the first value and the second value are not equal.

2. The method of claim 1, wherein the power supply regulating the output voltage to a first voltage comprises:

the power supply determines the first voltage according to the target voltage, the voltage regulating coefficient and the output voltage;

the power supply regulates the output voltage to the first voltage.

3. The method of claim 2, wherein the voltage regulation factor is greater than 0 and less than 1.

4. The method according to claim 1, wherein the method further comprises:

when the absolute value of the difference between the first voltage and the target voltage is larger than the preset voltage threshold, the power supply adjusts the first voltage to a second voltage, wherein the adjusting quantity is a third value, and the third value is smaller than the first value;

the power supply adjusts the second voltage to the target voltage through at least one adjustment according to the second voltage, the target voltage and the preset voltage threshold.

5. The method of claim 4, wherein after the power supply regulates the output voltage to the first voltage, the method further comprises: the power supply waits for a preset time period;

After the power supply regulates the first voltage to the second voltage, the method further includes:

and the power supply waits for the preset time period.

6. The method of any of claims 1-5, wherein the load comprises at least one of: MODEM processor, application processor, accelerator.

7. A voltage regulating device, the device comprising:

a receiving unit configured to receive voltage indication information from the load, the voltage indication information being configured to indicate a target voltage of the load;

an adjusting unit, configured to adjust the output voltage to a first voltage when an absolute value of a difference between the output voltage of the power supply and the target voltage is greater than a preset voltage threshold, where the adjustment amount is a first value;

the adjusting unit is further configured to adjust the first voltage to the target voltage when an absolute value of a difference between the first voltage and the target voltage is less than or equal to the preset voltage threshold, where the adjustment amount is a second value;

wherein the first value and the second value are not equal.

8. The device according to claim 7, characterized in that the adjusting unit is in particular also used for;

And determining the first voltage according to the target voltage, the voltage regulating coefficient and the output voltage, and regulating the output voltage to the first voltage.

9. The apparatus of claim 8, wherein the voltage regulation factor is greater than 0 and less than 1.

10. The apparatus of claim 7, wherein the adjustment unit is further configured to:

when the absolute value of the difference between the first voltage and the target voltage is larger than the preset voltage threshold, the first voltage is regulated to a second voltage, wherein the regulating quantity is a third numerical value, and the third numerical value is smaller than the first numerical value;

and adjusting the second voltage to the target voltage through at least one adjustment according to the second voltage, the target voltage and the preset voltage threshold.

11. The apparatus of claim 10, wherein the adjustment unit is further configured to:

after the output voltage is regulated to the first voltage, waiting for a preset time period;

and after the first voltage is regulated to the second voltage, waiting for the preset time period.

12. The apparatus of any of claims 7-11, wherein the load comprises at least one of: MODEM, application processor, accelerator.

13. A communication device comprising a load and a power supply for powering the load, the power supply being the voltage regulating device according to any of claims 7-12.