CN100582991C - Voltage stabilizer circuit - Google Patents
Voltage stabilizer circuit Download PDFInfo
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- CN100582991C CN100582991C CN200510008884A CN200510008884A CN100582991C CN 100582991 C CN100582991 C CN 100582991C CN 200510008884 A CN200510008884 A CN 200510008884A CN 200510008884 A CN200510008884 A CN 200510008884A CN 100582991 C CN100582991 C CN 100582991C
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- H—ELECTRICITY
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Abstract
To provide a regulator circuit capable of reducing capacitance and ESR of an output capacitor C<SB>0</SB>at a low cost. This regulator circuit is provided with an output transistor Q10 connected between a power source terminal V<SB>DD</SB>and an output terminal V<SB>OUT</SB>, dividing circuits R1 and R2 dividing output voltage between the output terminal and a ground terminal to generate divided voltage from an intermediate node N1, error amplifiers Q1-Q8 and 11 generating an error signal according to a difference between a reference voltage and the divided voltage, and a control transistor Q9 controlling the output transistor according to the error signal. In the regulator circuit, a first phase correction capacitor C1 is connected between the output terminal and the intermediate node N1 of the dividing circuit, while a second phase correction capacitor C2 is connected between the output terminal and a predetermined node N2 of the error amplifiers.
Description
Technical field
The present invention relates to voltage regulator circuit, particularly relate to the serial voltage stabilizer IC that must carry out big electric current output.
Background technology
Voltage regulator circuit is to make the supply voltage that provides from the outside stablize and provide to lead-out terminal the circuit of the output voltage after stablizing.After output capacitor being connected on the lead-out terminal of voltage regulator circuit, load is connected on the lead-out terminal of voltage regulator circuit.Like this, with voltage regulator circuit stable and with the output capacitor smoothing output voltage offer load.
As the output capacitor Co of the outgoing side that is connected voltage regulator circuit, generally be electrolytic condenser or tantalum capacitor, but in order to adapt to the miniaturization requirement, forward use the ceramic capacitor development of low capacity.
, capacitor has different ESR values (Equivalent Series Resistance: equivalent series resistance) according to kind.For example, the ESR value of electrolytic condenser changes with frequency or temperature, has the ESR value of about 0.1～100 (Ω); Tantalum capacitor has the ESR value of 0.1～1 (Ω).And ceramic capacitor has the ESR value of 0.001～0.1 (Ω).Under the inappropriate situation of relation between the phase compensation scope of the ESR of the output capacitor that connects on the lead-out terminal of voltage regulator circuit value and voltage regulator circuit, may produce vibration.
Fig. 1 shows the formation of existing voltage regulator circuit.
Illustrated voltage regulator circuit is to have power supply terminal V
DD, ground terminal GND and lead-out terminal V
OUT3 end voltage regulator circuits (serial voltage stabilizer IC).Illustrated voltage regulator circuit is for example voltage regulator circuit of the big electric current output usefulness more than the 150mA of output current, is bipolar transistor so constitute the transistor of this circuit.As everyone knows, bipolar transistor has as the base stage of control terminal and as the collector and emitter of a pair of main electrode terminal.
This voltage regulator circuit has constant current source the 11, the 1st to the 10th transistor Q1～Q10, the 1st and the 2nd resistance R 1, R2 and phase correction electricity consumption container C 1.
Constant current source 11 and the 1st to the 8th transistor Q1～Q8 constitute the error amplifier that produces error signal, and this error signal is corresponding to by the difference of the branch pressure voltage after the 1st and the 2nd resistance R 1, the R2 dividing potential drop with the reference voltage that is generated by not shown reference voltage generating circuit.
The 9th transistor Q9 after the error signal amplification of error amplifier output, supplies with the base stage of the 10th transistor Q10 as oxide-semiconductor control transistors.
The 10th transistor is to be connected power supply terminal V
DDWith lead-out terminal V
OUTBetween output transistor (power transistor), will bestow power supply terminal V
DDThe input voltage voltage stabilizing after, to lead-out terminal V
OUTOutput voltage is provided.
The the 1st and the 2nd resistor R 1, R2 are connected in series mutually, are connected lead-out terminal V then
OUTAnd between the ground terminal GND.As previously mentioned, these resistor R 1 and R2 will generate branch pressure voltage after the output voltage dividing potential drop as bleeder circuit.
Phase correction electricity consumption container C 1 is connected lead-out terminal V
OUTAnd between the intermediate node N1 of the branch pressure voltage of the above-mentioned bleeder circuit of generation.
The combination of the 1st and the 2nd resistor R 1, R2 and phase correction electricity consumption container C 1 is as leading phase compensating circuit (for example, with reference to non-patent literature 1), and above-mentioned voltage regulator circuit is for example put down in writing in non-patent document 2 to some extent.
Next, the formation of specification error signal amplifier.The 1st transistor Q1 is made of npn type bipolar transistor, and reference voltage is offered its base stage; The 2nd transistor Q2 also is made of npn type bipolar transistor, and branch pressure voltage is offered its base stage.Couple together between the emitter of the 1st transistor Q1 and the 2nd transistor Q2, through constant current source 11 ground connection.
The 1st current mirror circuit that is made of the 3rd and the 4th transistor Q3, Q4 is connected collector and the power supply terminal V of the 1st transistor Q1
DDBetween; The the 3rd and the 4th transistor Q3, Q4 are made of npn type bipolar transistor, and the emitter of the 3rd and the 4th transistor Q3, Q4 is connected power supply terminal V
DDOn.The base stage of the 3rd transistor Q3 is connected with the base stage of the 4th transistor Q4; The base stage of the 4th transistor Q4 is connected to the collector of the 4th transistor Q4; The collector of the 4th transistor Q4 is connected on the collector of the 1st transistor Q1.
The 2nd current mirror circuit that is made of the 5th and the 6th transistor Q5, Q6 is connected collector and the power supply terminal V of the 2nd transistor Q2
DDBetween; The the 5th and the 6th transistor Q5, Q6 are made of npn type bipolar transistor, and the emitter of the 5th and the 6th transistor Q5, Q6 is connected power supply terminal V
DDOn.The base stage of the 5th transistor Q5 is connected with the base stage of the 6th transistor Q6; The base stage of the 6th transistor Q6 is connected to the collector of the 6th transistor Q6; The collector of the 6th transistor Q6 is connected on the collector of the 2nd transistor Q2.
The 3rd current mirror circuit that is made of the 7th and the 8th transistor Q7, Q8 is connected between the 1st current mirror circuit and the 2nd current mirror circuit and the ground terminal.The the 7th and the 8th transistor Q7, Q8 are made of npn type bipolar transistor, the emitter of the 7th and the 8th transistor Q7, Q8 is connected on the ground terminal, the base stage of the 7th transistor Q7 is connected with the base stage of the 8th transistor Q8, and the collector of the 7th transistor Q7 is connected on the collector of the 3rd transistor Q3.The base stage of the 8th transistor Q8 is connected on the collector of the 8th transistor Q8, and the collector of the 8th transistor Q8 is connected on the collector of the 5th transistor Q5.
The tie point of the 1st current mirror circuit and the 3rd current mirror circuit (in other words, the collector of the 3rd transistor Q3 and the 7th transistor Q7) is the output node of the above-mentioned error signal of output.
The 9th transistor Q9 as oxide-semiconductor control transistors is made of npn type bipolar transistor, and its base stage is connected on the above-mentioned output node, and emitter is connected on the ground terminal.
The 10th transistor Q10 as output transistor is made of npn type bipolar transistor, and its base stage is connected on the collector of the 9th transistor Q9, and emitter is connected power supply terminal V
DDOn, collector is connected lead-out terminal V
OUTOn.
In the voltage regulator circuit of Fig. 1, in case supply voltage (for example, 3～7 (V)) is put on power supply terminal V
DD, with the corresponding electric current of voltage difference that applies on the base stage of the 1st and the 2nd transistor Q1, Q2 this two transistors of just flowing through.The reference voltage that offers the base stage of the 1st transistor Q1 is 0.6～1.2 (V) for example.
The electric current that the 1st and the 2nd current mirror circuit makes respectively and the electric current of flow through the 1st and the 2nd transistor Q1, Q2 is onesize flow through the 7th and the 8th transistor Q7, Q8.The electric current difference that offers the 7th and the 8th transistor Q7, Q8 is applied on the base stage of the 9th transistor Q9 voltage (error signal), and the electric current of the 9th transistor Q9 that flows through thus changes.As a result, the 10th transistorized base current changes, and makes to offer lead-out terminal V
OUTOutput voltage (for example, 0.8～5 (V)) voltage stabilizing (stabilization).
Phase correction electricity consumption container C 1 for example has the capacitance of 20pF, and the phase correction scope (leading phase compensation) of this voltage regulator circuit is enlarged.
General, produce vibration in order not make voltage regulator circuit, gaining must guarantee for example more than 45 ° for the phase margin under the frequency of 0dB (margin).
Express among Fig. 2 the voltage regulator circuit of having removed correction electricity consumption container C 1 in the voltage regulator circuit of Fig. 1, the ESR of output capacitance Co is the open-circuit characteristic of 0.01 Ω, the voltage regulator circuit when output current is 500mA.As can be seen from Figure 2, in not having the voltage regulator circuit of proofreading and correct electricity consumption container C 1, there is not gain to be the phase margin under the frequency of 0dB.Therefore, do not have the voltage regulator circuit of proofreading and correct electricity consumption container C 1 and can produce vibration.
Be illustrated among Fig. 3 in the voltage regulator circuit of Fig. 1, the ESR of output capacitor Co is the open-circuit characteristic of 0.01 Ω, the voltage regulator circuit when output current is 500mA.As can be seen from Figure 3, even possess in the voltage regulator circuit of proofreading and correct electricity consumption container C 1, there is not gain to be the phase margin under the frequency of 0dB yet.Therefore there is the voltage regulator circuit of proofreading and correct electricity consumption container C 1 also can vibrate.
Like this, under the low situation of the ESR of output capacitance Co, even be provided with phase correction electricity consumption container C 1, voltage regulator circuit also can vibrate.
No. 98.08 p409 of [non-patent literature 1] transistor technology
[non-patent literature 2] " practical Analogical Electronics design method " crossed the Bian Yixiong work, the distribution of integrated electronics publishing house, and 1996.6.22, the 1st edition 4 chapter low voltage designs method will be put p110 with design
As mentioned above, existing voltage regulator circuit is difficult to adapt to the low capacityization of output capacitor Co, low ESRization.
Summary of the invention
The voltage regulator circuit that the purpose of this invention is to provide a kind of low capacityization that can adapt to output capacitor Co, low ESRization.
According to the present invention, has power supply terminal V
DD, lead-out terminal V
OUTAnd the voltage regulator circuit of ground terminal possesses the output transistor Q10 that is connected between described power supply terminal and the described lead-out terminal, generates bleeder circuit R1, R2, the generation of branch pressure voltage corresponding to the error amplifier Q1～Q8 of the error signal of the difference of reference voltage and described branch pressure voltage, 11 and control the oxide-semiconductor control transistors Q9 of described output transistor according to described error signal with the output voltage dividing potential drop between this lead-out terminal and the described ground terminal and from intermediate node N1, and controls described output transistor and make described output voltage stabilizationization; It is characterized in that in described voltage regulator circuit, having the 1st phase correction electricity consumption container C 1 between the described intermediate node that is connected described lead-out terminal and described bleeder circuit and be connected the 2nd phase correction electricity consumption container C 2 between the node N2 of regulation of described lead-out terminal and described error amplifier.
In described voltage regulator circuit, described error amplifier is by the 1st transistor Q1 with control terminal of supplying with described reference voltage, the 2nd transistor Q2 with control terminal of supplying with described branch pressure voltage, be connected the main electrode terminal of described the 1st transistor and the described the 2nd a transistorized end and the constant current source 11 between the described ground terminal, be connected the main electrode terminal of described the 1st transistorized other end and the 1st current mirror circuit Q3 between the described power supply terminal, Q4, be connected the main electrode terminal of described the 2nd transistorized other end and the 2nd current mirror circuit Q5 between the described power supply terminal, Q6, be connected the 3rd current mirror circuit Q7 between described the 1st current mirror circuit and described the 2nd current mirror circuit and the described ground terminal, Q8 constitutes.The tie point of described the 1st current mirror circuit and described the 3rd current mirror circuit is the output node N3 of the described error signal of output.The main electrode terminal that described the 3rd current mirror circuit comprises the one end is connected to the transistor Q7 on the output node, the node N2 that this transistorized control terminal is described regulation.
In above-mentioned voltage regulator circuit, the transistor that constitutes described error amplifier preferably is made of bipolar transistor.In this case, described the 3rd current mirror circuit comprises the other transistor Q8 that is connected between described the 2nd current mirror circuit and the described ground terminal, 2 resistance R 3 with same resistance value, R4 is connected in series between the node of this transistorized control terminal and described regulation, and preferably the main electrode terminal with the tie point of these two resistance and a described other transistorized end directly couples together.
In above-mentioned voltage regulator circuit, the capacitance that described the 2nd phase correction electricity consumption container C 2 preferably has 0.5pF～20pF scope, described two resistance R 3, R4 preferably has the resistance of 200 Ω～60k Ω scope.The time constant of determining with the capacitance of capacitor by the resistance value and described the 2nd phase correction of described two resistance is decided by the frequency that will implement the leading phase compensation.
Symbol in the above-mentioned bracket is to add for a better understanding of the present invention, does not limit the present invention.
In order to prevent the voltage regulator circuit vibration, not only be provided with the 1st phase correction capacitor, also be provided with the 2nd phase correction capacitor, so the voltage regulator circuit that can adapt to low capacityization, low ESRization can be provided
Description of drawings
Fig. 1 is the circuit diagram of an example of existing voltage regulator circuit;
Fig. 2 is that to have removed phase correction from the voltage regulator circuit of Fig. 1 be no-load characteristic figure under the 500mA situation with the voltage regulator circuit of capacitor at ESR=0.01 Ω, output current;
Fig. 3 is that the voltage regulator circuit of Fig. 1 is no-load characteristic figure under the 500mA situation at ESR=0.01 Ω, output current;
Fig. 4 is the circuit diagram of the voltage regulator circuit of one embodiment of the present of invention;
Fig. 5 is that to have removed phase correction from the voltage regulator circuit of Fig. 4 be no-load characteristic figure under the 500mA situation with the voltage regulator circuit of two resistors of circuit at ESR=0.01 Ω, output current;
Fig. 6 is that the voltage regulator circuit of Fig. 4 is no-load characteristic figure under the 500mA situation at ESR=0.01 Ω, output current.
Embodiment
Below embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 4 is the circuit diagram of the voltage regulator circuit (serial voltage stabilizer IC) of one embodiment of the present of invention.This voltage regulator circuit has and the essentially identical formation of existing voltage regulator circuit, and different is to have the phase-correcting circuit 40 that comprises the 2nd phase correction electricity consumption container C 2.
In detail, this voltage regulator circuit has constant current source the 11, the 1st to the 10th transistor Q1～Q10, the 1st and the 2nd resistance R 1, R2, the 1st phase correction electricity consumption container C 1 and phase-correcting circuit 40.Phase-correcting circuit 40 is made of the 3rd and the 4th resistance R 3, R4 (for example, 5 (K Ω), 5 (K Ω)) and the 2nd phase correction electricity consumption container C 2 (for example, 3 (pF)).
In other words, illustrated voltage regulator circuit possesses the power supply terminal of being connected V
DDWith lead-out terminal V
OUTBetween output transistor Q10, with this lead-out terminal V
OUTAnd after the output voltage dividing potential drop between ground terminal from intermediate node N1 generate branch pressure voltage bleeder circuit (R1, R2), produce corresponding to the error amplifier (Q1～Q8, Q11) of the error signal of the difference of reference voltage and branch pressure voltage and control the oxide-semiconductor control transistors Q9 of output transistor Q10 according to error signal.Voltage regulator circuit is the circuit that comes regulated output voltage by control output transistor Q10; Illustrated voltage regulator circuit also possesses the lead-out terminal of being connected V
OUT(R1, the 1st phase correction electricity consumption container C 1 between intermediate node N1 R2) is connected lead-out terminal V with comprising with bleeder circuit
OUTAnd the phase-correcting circuit 40 of the 2nd phase correction electricity consumption container C 2 between the node N2 (aftermentioned) of error amplifier regulation.
Because illustrated voltage regulator circuit is the voltage regulator circuit of necessary big electric current output, all is bipolar transistor so constitute the transistor of this voltage regulator circuit.As everyone knows, bipolar transistor has as the base stage of control terminal with as the collector and emitter of a pair of main electrode terminal.
Constant current source 11 and the 1st to the 8th transistor Q1～Q8 constitutes the error amplifier according to the difference generated error signal of two input signals (branch pressure voltage described later and reference voltage).
The the 1st and the 2nd transistor Q1 and Q2 are made of npn type bipolar transistor.The emitter of these transistors Q1 and Q2 is connected on the constant current source 11 jointly, and collector is connected on the described later the 1st and the 2nd current mirror circuit.Supply with the base stage of the 1st transistor Q1 by the reference voltage of not shown voltage generation circuit generation; (R1, the branch pressure voltage of R2) intermediate node N1 output supply with the base stage of the 2nd transistor Q2 from a minute hydraulic circuit.The the 1st and the 2nd transistor Q1, Q2 are cut apart the rule steady current that constant current source 11 generates according to the difference of the voltage of supplying with these base stages.
The the 3rd and the 4th transistor Q3, Q4 is made of npn type bipolar transistor.The emitter of these transistors Q3, Q4 all is connected power supply terminal V
DDOn, base stage interconnects, and also is connected on the collector of the 4th transistor Q4 simultaneously.The collector of the 3rd transistor Q3 is connected on the collector of the 7th transistor Q7 described later.These transistors Q3 and Q4 constitute the 1st current mirror circuit, offering the 7th transistor Q7 with the identical electric current of the 1st transistor Q1 of flowing through.
The the 5th and the 6th transistor Q5 and Q6 are made of npn type bipolar transistor.The emitter of these transistors Q5 and Q6 all is connected power supply terminal V
DDOn, base stage interconnects, and also is connected on the collector of the 6th transistor Q6 simultaneously.The collector of the 5th transistor Q5 is connected on the collector of the 8th transistor Q8 described later.These transistors Q5 and Q6 constitute the 2nd current mirror circuit, offering the 8th transistor Q8 with the identical electric current of the 2nd transistor Q2 of flowing through.
The the 7th and the 8th transistor Q7 and Q8 are made of npn type bipolar transistor.The emitter of the 7th transistor (error signal generates and uses transistor) Q7 is connected on the ground terminal, and base stage is connected an end of the 3rd resistance R 3 of phase-correcting circuit 40.The emitter of the 8th transistor Q8 is connected on the ground terminal, and base stage is connected an end of the 4th resistance R 4 of phase-correcting circuit 40.The collector of the 8th transistor Q8 is connected on the tie point of the 3rd and the 4th resistance R 3, R4.And the 7th and the 8th transistor Q7, Q8 constitute the 3rd current mirror circuit, are the voltage (error signal) that produces on the output node N3 corresponding to the difference of the electric current that is provided to the 7th transistor Q7 and the 8th transistor Q8 respectively at the collector of the 7th transistor Q7.
The 9th transistor Q9 is made of npn type bipolar transistor.The emitter of the 9th transistor Q9 is connected on the ground terminal, and collector is connected on the base stage of the 10th transistor Q10, and base stage is connected on collector (collector of the 3rd transistor Q3) N3 of the 7th transistor Q7.The 9th transistor Q9 is as oxide-semiconductor control transistors, and control flows into the electric current of the base stage of the 10th transistor Q10 according to error signal.
The 10th transistor Q10 is made of npn type bipolar transistor.The emitter of the 10th transistor Q10 is connected power supply terminal V
DDOn, collector is connected lead-out terminal V
OUTOn.After the 10th transistor Q10 offers the supply voltage of power supply terminal according to its base current adjustment, to lead-out terminal V
OUTOutput voltage is provided.
The the 1st and the 2nd resistance R 1 and R2 are connected in series mutually, are connected lead-out terminal V then
OUTAnd between the ground terminal.And these resistance R 1 are connected on the base stage of aforesaid the 2nd transistor Q2 with tie point (intermediate node) N1 of R2.The the 1st and the 2nd resistance R 1 and R2 are as bleeder circuit, to being provided to lead-out terminal V
OUTOn output voltage carry out dividing potential drop, and provide branch pressure voltage to the base stage of the 2nd transistor Q2.
The 1st phase correction electricity consumption container C 1 is connected lead-out terminal V
OUTAnd between the intermediate node N1 of bleeder circuit.
One end of the 2nd phase correction electricity consumption container C 2 of phase-correcting circuit 40 is connected lead-out terminal V
OUTOn, the other end is connected on the base stage of the 7th transistor Q7.That is, the base stage of the 7th transistor Q7 is the node N2 of error amplifier regulation.The 2nd phase correction electricity consumption container C 2 changes the base potential of the 7th transistor Q7 according to output voltage, proofreaies and correct from the error signal of error amplifier output.
According to above formation, the same with prior art, the voltage regulator circuit adjustment of Fig. 4 puts on power supply terminal V
DDOn supply voltage, and the supply voltage after the voltage stabilizing is provided to lead-out terminal V as output voltage
OUT
The voltage regulator circuit of present embodiment not only is provided with the 1st phase correction capacitor C1, also is provided with the phase-correcting circuit 40 that comprises the 2nd phase correction electricity consumption container C 2, so can further carry out the leading phase compensation than existing voltage regulator circuit.
What Fig. 5 represented is in the voltage regulator circuit of having removed the 3rd and the 4th resistor R 3, R4 from the voltage regulator circuit of Fig. 4, and the ESR of output capacitor Co is the open-circuit characteristic of 0.01 Ω, the voltage regulator circuit when output current is 500mA.As can be seen from Figure 5, in the voltage regulator circuit that does not possess the 3rd and the 4th resistor R 3, R4, there is not gain to be the phase margin (margin) under the frequency of 0dB.Therefore, there is not the voltage regulator circuit of the 3rd and the 4th resistance R 3, R4 can produce vibration.
What Fig. 6 represented is in the voltage regulator circuit of Fig. 4, and the ESR of output capacitor Co is the open-circuit characteristic of 0.01 Ω, the voltage regulator circuit when output current is 500mA.As can be seen from Figure 6, in the voltage regulator circuit of Fig. 4, gaining is about 60 ° for the phase margin under the frequency of 0dB (margin).And, in the frequency band more than phase place is 0 frequency, because gain is negative value, so voltage regulator circuit does not produce vibration.
As mentioned above, the voltage regulator circuit of present embodiment not only is provided with the 1st phase correction capacitor C1, also is provided with the phase-correcting circuit 40 that comprises the 2nd phase correction electricity consumption container C 2, so can adapt to the output capacitor Co of low capacity, low ESR.
Constitute the 7th identical of the 3rd current mirror circuit because must make, have identical resistance value with the 4th resistor R 3, R4 so constitute the 3rd of phase-correcting circuit 40 with the base-emitter current potential of the 8th transistor Q7, Q8.Preferably select the resistance value of the resistance value of 200 Ω～60k Ω scope for use as the 3rd and the 4th resistor R 3, R4.Setting the lower limit resistance value is 200 Ω, is that electric current for do not flowed through the 3rd and the 4th resistor R 3, R4 is that the resistance of the emitter of about 1 μ A, the 7th and the 8th transistor Q7 and Q8 is the influence of about 26 Ω.The capping resistance value is 60k Ω, is that the manufacturing process deviation is big, is difficult to produce the resistance with same resistance value because when making the resistance have than this higher resistance value.
On the other hand, preferably range of choice is the capacitance of 0.5pF～20pF, as the capacitance of the 2nd phase correction with electric capacity C2.The problem that has the capacitor aspect of above-mentioned capacitance from the semiconductor applications manufacturing considers, the capacitance of above-mentioned capacitor C 2 is taken at 0.5pF～20pF scope, is suitable value.
Decide by the frequency that will implement the leading phase compensation by the resistance value of the 3rd and the 4th resistance R 3, R4 and the definite time constant of capacitance of the 2nd phase correction electricity consumption container C 2.
The inventor confirms, in voltage regulator circuit shown in Figure 4, capacitor is connected between the base stage and collector of the 7th transistor Q7, just can further improve the effect of leading phase compensation.As the capacitance of this electric capacity, suitable scope is 0.5pF～20pF.
The present invention is not defined to the above embodiments, comprises all possible changes in the scope that does not deviate from aim of the present invention certainly.For example, in the above-described embodiments, be the voltage regulator circuit that explanation is made of bipolar transistor, still, be that the present invention is equally also applicable to the voltage regulator circuit that is made of MOSFET under the little output current of the scope of the 50mA～100mA situation about using at output current.Each MOSFET has as the grid of control terminal and as the drain electrode and the source electrode of a pair of main electrode terminal.In this case, except that the 1st phase correction capacitor, one the 2nd phase correction capacitor can also be set at least.
Claims (5)
1. one kind has power supply terminal, the voltage regulator circuit of lead-out terminal and ground terminal, possesses the output transistor that is connected between described power supply terminal and the described lead-out terminal, with the output voltage dividing potential drop between this lead-out terminal and the described ground terminal and generate the bleeder circuit of branch pressure voltage from intermediate node, generation is controlled the oxide-semiconductor control transistors of described output transistor corresponding to the error amplifier of the error signal of the difference of reference voltage and described branch pressure voltage with according to described error signal, and this voltage regulator circuit is controlled described output transistor and made described output voltage stabilizationization; The 1st phase correction that it is characterized in that having in described voltage regulator circuit between the described intermediate node that is connected described lead-out terminal and described bleeder circuit generates with the 2nd phase correction capacitor between the transistorized base stage with capacitor and the error signal that is connected described lead-out terminal and described error amplifier.
2. according to the voltage regulator circuit of claim 1 record, it is characterized in that:
Described error amplifier is by the 1st transistor with control terminal of supplying with described reference voltage, the 2nd transistor with control terminal of supplying with described branch pressure voltage, be connected the main electrode terminal of the common end that connects of described the 1st transistor and described the 2nd transistor and the constant current source between the described ground terminal, be connected the main electrode terminal of described the 1st transistorized other end and the 1st current mirror circuit between the described power supply terminal, be connected the main electrode terminal of described the 2nd transistorized other end and the 2nd current mirror circuit between the described power supply terminal, the 3rd current mirror circuit that is connected between described the 1st current mirror circuit and described the 2nd current mirror circuit and the described ground terminal constitutes;
The tie point of described the 1st current mirror circuit and described the 3rd current mirror circuit is the output node of the described error signal of output; Described the 3rd current mirror circuit comprises transistor, and the main electrode terminal of this transistorized end is connected on the described output node, and the transistorized control terminal of this of described the 3rd current mirror circuit is the transistorized base stage of described error signal generation.
3. according to the voltage regulator circuit of claim 2 record, it is characterized in that:
The transistor that constitutes described error amplifier is made of bipolar transistor; Described the 3rd current mirror circuit comprises the other transistor that is connected between described the 2nd current mirror circuit and the described ground terminal, this other transistorized control terminal and described error signal that 2 resistance with same resistance value are connected in series in described the 3rd current mirror circuit generate with between the transistorized base stage, and the tie point of these two resistance and the described other main electrode terminal of a transistorized end directly couple together.
4. according to the voltage regulator circuit of claim 3 record, it is characterized in that: the capacitance that described the 2nd phase correction electricity consumption container has 0.5pF～20pF scope, described two resistance have the resistance value of 200 Ω～60k Ω scope separately.
5. according to the voltage regulator circuit of claim 4 record, it is characterized in that: the time constant of determining with the capacitance of capacitor by the resistance value and described the 2nd phase correction of described two resistance is decided by the frequency that will implement the leading phase compensation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004285807A JP2006099500A (en) | 2004-09-30 | 2004-09-30 | Regulator circuit |
| JP2004285807 | 2004-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1755568A CN1755568A (en) | 2006-04-05 |
| CN100582991C true CN100582991C (en) | 2010-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510008884A Active CN100582991C (en) | 2004-09-30 | 2005-02-24 | Voltage stabilizer circuit |
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| JP (1) | JP2006099500A (en) |
| KR (1) | KR20060042200A (en) |
| CN (1) | CN100582991C (en) |
| TW (1) | TW200611096A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008056895A1 (en) * | 2006-11-06 | 2008-05-15 | Chan Woong Park | Circuit for output voltage error correction in smps which regulation is done by primary side control |
| JP4374388B2 (en) * | 2007-10-10 | 2009-12-02 | Ｏｋｉセミコンダクタ株式会社 | Voltage control circuit |
| CN103926965B (en) * | 2013-01-16 | 2016-04-27 | 上海华虹集成电路有限责任公司 | Automatic biasing constant current voltage stabilizing circuit |
| CN110045778B (en) * | 2018-01-16 | 2020-07-31 | 智原科技股份有限公司 | Voltage generating device and calibration method thereof |
| JP7121637B2 (en) * | 2018-11-12 | 2022-08-18 | 日立Astemo株式会社 | electronic device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02235119A (en) * | 1989-03-09 | 1990-09-18 | Sharp Corp | Power supply circuit |
| JPH11122195A (en) * | 1997-10-14 | 1999-04-30 | Sharp Corp | Integrated circuit incorporating photodetector |
| JP3671635B2 (en) * | 1997-12-04 | 2005-07-13 | 富士電機デバイステクノロジー株式会社 | 3-terminal regulator |
| JP3527216B2 (en) * | 2001-05-29 | 2004-05-17 | シャープ株式会社 | DC stabilized power supply circuit |
| JP2003330550A (en) * | 2002-03-06 | 2003-11-21 | Ricoh Co Ltd | Constant voltage power supply circuit |
| JP2004102472A (en) * | 2002-09-06 | 2004-04-02 | Sharp Corp | Direct current stabilization power source unit, and electronic equipment provided with direct current stabilization power source unit |
| JP4087221B2 (en) * | 2002-10-31 | 2008-05-21 | シャープ株式会社 | Amplifying circuit and power supply device having the same |
| JP4016273B2 (en) * | 2003-04-15 | 2007-12-05 | ミツミ電機株式会社 | Regulator circuit |
-
2004
- 2004-09-30 JP JP2004285807A patent/JP2006099500A/en active Pending
-
2005
- 2005-01-31 TW TW094102896A patent/TW200611096A/en unknown
- 2005-02-24 CN CN200510008884A patent/CN100582991C/en active Active
- 2005-02-25 KR KR1020050015649A patent/KR20060042200A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| TW200611096A (en) | 2006-04-01 |
| KR20060042200A (en) | 2006-05-12 |
| TWI353498B (en) | 2011-12-01 |
| JP2006099500A (en) | 2006-04-13 |
| CN1755568A (en) | 2006-04-05 |
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