CN201134055Y - Linear voltage-stabilized power supply - Google Patents
Linear voltage-stabilized power supply Download PDFInfo
- Publication number
- CN201134055Y CN201134055Y CNU2007201308439U CN200720130843U CN201134055Y CN 201134055 Y CN201134055 Y CN 201134055Y CN U2007201308439 U CNU2007201308439 U CN U2007201308439U CN 200720130843 U CN200720130843 U CN 200720130843U CN 201134055 Y CN201134055 Y CN 201134055Y
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- power tube
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Abstract
The utility model provides a linear regulated power supply comprises a transconductance amplifier with high performance and an over-current and over-temperature protection buffer; wherein, the output end of the over-current and over-temperature protection buffer is connected with the input end of a MOS power tube with high voltage, the output current of which is connected with the transconductance amplifier through a sampling circuit; the other input end of the transconductance amplifier is connected with a high-precision voltage reference; an output capacitor Cout and an equivalent series resistance ESR are connected in serial between the output end of the MOS power tube with high voltage and the ground; a capacitor, a resistance and a ground serial are arranged between the transconductance amplifier and the over-current and over-temperature protection buffer and used for counteracting the pole caused by the MOS power tube with high voltage. The power supply greatly cuts down the static power of the whole integrated circuit, greatly improves the entire system, lengthens the service life of cells of electronic products in portable application field and simplifies the design required by radiation.
Description
Technical field
The utility model provides a kind of linear stabilized power supply, particularly a kind of high-performance linear analogue integrated circuit-linear stabilized power supply based on the development of modern semiconductors process exploitation.
Background technology
Like product is confined to narrow input voltage range (≤5 volts) on the home market at present, is being blank aspect the wide input voltage power supply, and the similar products that are higher than the certain voltage scope all will depend on import, also have only several families to produce abroad.The wide input voltage power IC all has the very big market demand at home and abroad, and the most of linear stabilized power supply integrated circuit in home market all are based on the product of bipolar technology now.Their subject matter is: 1, vagabond current is excessive and cause power big and efficient is low.2, can not satisfy that to be used for capacity ratio less and to the ESR of the electric capacity situation that has certain requirements.3, the applied voltage scope is wide inadequately, has increased inconvenience to the user on design is used and managed.
Summary of the invention
Goal of the invention: the purpose of this utility model is at the deficiencies in the prior art, and a kind of wide input voltage range, power is big, efficient is high linear stabilized power supply are provided.
Technical scheme: a kind of linear stabilized power supply described in the utility model, it comprises high-performance trsanscondutance amplifier and excess-current excess-temperature protection and impact damper, it is characterized in that, the output of excess-current excess-temperature protection and impact damper links to each other with the input end of high-pressure MOS power tube, and the output current of high-pressure MOS power tube is connected with the high-performance trsanscondutance amplifier through sample circuit; Another input end of high-performance trsanscondutance amplifier also links to each other with high-precision voltage reference; Output capacitance Cout and equivalent serial resistance ESR are connected between the output terminal and ground of high-pressure MOS power tube; Between protection of high-performance trsanscondutance amplifier and excess-current excess-temperature and impact damper also with electric capacity, resistance and connect, be used to offset the limit that the high-pressure MOS power tube causes.
Beneficial effect: the utility model can be applicable to very wide range of application, comprising the electrochemical capacitor of wide input voltage range and various output capacitance such as high ESR or the ceramic condenser of low ESR.It can be used for computing machine, mobile phone, and the telecommunications industry electronics is in the multinomial electronic application field such as automotive electronics and power supply electronic.
Output voltage of the present utility model can reach ± 1% precision, and low current is reduced to about 1mA to 10mA from 5 of prior art.The reduction of low current makes the static power of whole integrated circuit reduce greatly, total system efficient improves greatly, adapt to the requirement of modern society to the green trend trend of whole industry, can prolong the battery life of the electronic product in portable use field, can simplify the design that heat radiation requires, at all in other the electronic application because low-power makes reliability improve.
Description of drawings
Accompanying drawing is an electric principle schematic of the present utility model.
Embodiment
As shown in the figure, high-performance trsanscondutance amplifier 1 is connected with excess-current excess-temperature protection and impact damper 2.The output of excess-current excess-temperature protection and impact damper 2 links to each other with the input end of high-pressure MOS power tube 3.The output current of high-pressure MOS power tube 3 is connected with the reverse input end of high-performance trsanscondutance amplifier 1 through sample circuit 4, as feedback circuit.High-performance trsanscondutance amplifier 1 another input end also links to each other with high-precision voltage reference 5.Output capacitance 6 and equivalent serial resistance 7 are connected between the output terminal and ground of high-pressure MOS power tube 3, and in parallel with load.Between protection of high-performance trsanscondutance amplifier 1 and excess-current excess-temperature and impact damper 2 also with electric capacity 8, resistance 9 and connect, be used to offset the limit that high-pressure MOS power tube 3 causes.
It is as follows that the utility model gets main performance index: output voltage precision ± 1%, low stand by electric current＜10 μ A, low static working current＜2mA, wide input voltage range 3-20 volt.Main reliability index is 2 kilovolts of antistatic protections, ± 150mA latch up performance.
The utility model utilizes limit that limit that modern CMOS technology and output capacitance and power tube PMOS form forms as whole loop dominant pole and with the stray capacitance and the output resistance of circuit at different levels from far.Cancel out each other itself and the limit that output PMOS causes the zero point that adds an optimization.Make output voltage can reach ± 1% precision, low current is reduced to about 1mA to 10mA from 5 of prior art.The reduction of low current promotes the static power of whole integrated circuit to reduce greatly, and total system efficient improves greatly.
Claims (1)
1, a kind of linear stabilized power supply, it comprises high-performance trsanscondutance amplifier (1) and excess-current excess-temperature protection and impact damper (2), it is characterized in that, the output of excess-current excess-temperature protection and impact damper (2) links to each other with the input end of high-pressure MOS power tube (3), and the output current of high-pressure MOS power tube (3) is connected with high-performance trsanscondutance amplifier (1) through sample circuit (4); Another input end of high-performance trsanscondutance amplifier (1) also links to each other with high-precision voltage reference (5); Output capacitance Cout (6) and equivalent serial resistance ESR (7) are connected between the output terminal and ground of high-pressure MOS power tube (3); Between high-performance trsanscondutance amplifier (1) and excess-current excess-temperature protection and impact damper (2), also connect with electric capacity (8), resistance (9), and ground connection, thereby the zero point of offsetting high-pressure MOS power tube (3) limit that causes formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201308439U CN201134055Y (en) | 2007-12-10 | 2007-12-10 | Linear voltage-stabilized power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201308439U CN201134055Y (en) | 2007-12-10 | 2007-12-10 | Linear voltage-stabilized power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201134055Y true CN201134055Y (en) | 2008-10-15 |
Family
ID=40062322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201308439U Expired - Fee Related CN201134055Y (en) | 2007-12-10 | 2007-12-10 | Linear voltage-stabilized power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201134055Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388954A (en) * | 2015-12-16 | 2016-03-09 | 无锡中微爱芯电子有限公司 | Linear voltage regulator circuit |
| CN107272808A (en) * | 2017-08-11 | 2017-10-20 | 何金昌 | A kind of LDO circuit applied to integrated chip |
-
2007
- 2007-12-10 CN CNU2007201308439U patent/CN201134055Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388954A (en) * | 2015-12-16 | 2016-03-09 | 无锡中微爱芯电子有限公司 | Linear voltage regulator circuit |
| CN105388954B (en) * | 2015-12-16 | 2017-04-19 | 无锡中微爱芯电子有限公司 | Linear voltage regulator circuit |
| CN107272808A (en) * | 2017-08-11 | 2017-10-20 | 何金昌 | A kind of LDO circuit applied to integrated chip |
| CN107272808B (en) * | 2017-08-11 | 2019-01-29 | 泉州市天龙电子科技有限公司 | A kind of LDO circuit applied to integrated chip |
| CN109445503A (en) * | 2017-08-11 | 2019-03-08 | 李启同 | A kind of LDO circuit applied to integrated chip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUXI NEW SILICON MICROELECTRONICS CO., LTD. Free format text: FORMER OWNER: NANJING MADGETECH INC. Effective date: 20100511 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 210018 ROOM 303, BUILDING 6, XIDAYINGBI, ZHUJIANG ROAD, NANJING CITY, JIANGSU PROVINCE TO: 214028 ROOM 903, CHUANGYUAN BUILDING, NO.21-1, CHANGJING ROAD, NEW DISTRICT, WUXI CITY |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100511 Address after: 214028, 903 building, building 21-1, Changjiang Road, Wuxi New District Patentee after: WST (Wuxi) Microelectronic Co., Ltd. Address before: 210018 Jiangsu city of Nanjing Province Pearl River Road West Grand Building 6 Room 303 Patentee before: Nanjing Madge Technology Inc. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081015 Termination date: 20131210 |