CN101604174A - 稳压器 - Google Patents

稳压器 Download PDF

Info

Publication number
CN101604174A
CN101604174A CNA2009101505106A CN200910150510A CN101604174A CN 101604174 A CN101604174 A CN 101604174A CN A2009101505106 A CNA2009101505106 A CN A2009101505106A CN 200910150510 A CN200910150510 A CN 200910150510A CN 101604174 A CN101604174 A CN 101604174A
Authority
CN
China
Prior art keywords
voltage
circuit
phase compensation
transistor
differential amplifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CNA2009101505106A
Other languages
English (en)
Other versions
CN101604174B (zh
Inventor
二瓶洋太朗
黑藏忠
井村多加志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ablic Inc
Original Assignee
Seiko Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Instruments Inc filed Critical Seiko Instruments Inc
Publication of CN101604174A publication Critical patent/CN101604174A/zh
Application granted granted Critical
Publication of CN101604174B publication Critical patent/CN101604174B/zh
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10Regulating voltage or current
    • G05F1/46Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/575Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices characterised by the feedback circuit
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02Regulating voltage or current
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02Regulating voltage or current
    • G05F3/08Regulating voltage or current wherein the variable is dc
    • G05F3/10Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Nonlinear Science (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

本发明提供能够进行合理的相位补偿的稳压器。即便输入输出电压差小,也在电阻电路(19)上发生基于输出电压(Vout)的合理的相位补偿用电压,由于该合理的相位补偿用电压被供给相位补偿用电容(20),稳压器能够进行合理的相位补偿。

Description

稳压器
技术领域
本发明涉及稳压器(voltage regulator)。
背景技术
为了稳定工作,稳压器具备相位补偿电路。
图4是传统的具备相位补偿电路的稳压器的电路图。
当输出电压Vout变高时,分压电压Vfb也变高。若分压电压Vfb高于基准电压Vref,则差动放大电路76的输出电压变高。因而,输出晶体管73的栅极电压变高,所以输出晶体管73的漏极电流减少,输出电压Vout变低。因此,输出电压Vout被控制在一定的希望电压上。此时,读出晶体管(sense transistor)77的栅极电压也变高,因此读出晶体管77的漏极电流也减少。因而,流过电阻78的电流减少,所以电阻78上发生的电压也变低。这样,施加在相位补偿用电容79上的电压变化,从而进行相位补偿。
在此,分压电压Vfb成为叠加经由差动放大电路76、输出晶体管73、分压电路74和差动放大电路76的信号和经由差动放大电路76、读出晶体管77、相位补偿用电容79和差动放大电路76的相位补偿用信号的电压。
此外,与上述同样地,即便输出电压Vout变低,输出电压Vout也控制在一定的希望电压上。此时,与上述同样地,进行相位补偿(例如,参照专利文献1:日本特开2005-316788号公报)。
但是,在传统的稳压器中,当输入输出电压差小时,因负载条件而读出晶体管77的源极/漏极间电压变小,会有读出晶体管77进行非饱和动作,而输出晶体管73进行饱和动作的情形。于是,读出晶体管77的漏极电压的变动不会与输出晶体管73的漏极电压的变动一致。基于该读出晶体管77的漏极电压进行相位补偿,因此相位补偿并不合理。
发明内容
本发明鉴于上述课题构思而成,提供能够进行合理的相位补偿的稳压器。
为了解决上述课题,本发明的稳压器,其特征在于具备:设置在差动放大电路与输出晶体管之间的放大电路;设置在差动放大电路的输出端子上,并供给相位补偿用电流的电流供给电路;基于相位补偿用电流发生相位补偿用电压的电阻电路;以及设置在电阻电路与分压电路的输出端子之间并根据相位补偿用电压和分压电压进行相位补偿的相位补偿用电容。
(发明效果)
在本发明中,即使输入输出电压差小,也根据稳压器的输出电压而在电阻电路上发生合理的相位补偿用电压,由于该合理的相位补偿用电压供给相位补偿用电容,所以稳压器能够进行合理的相位补偿。
附图说明
图1是表示本发明的稳压器的概略电路图。
图2是表示本发明的稳压器的电流供给电路及电阻电路的实施例的电路图。
图3是表示本发明的稳压器的电流供给电路及电阻电路的实施例的电路图。
图4是表示传统稳压器的电路图。
(符号说明)
10  输入端子                11  接地端子
12  输出端子                13  输出晶体管
14  分压电路                15  基准电压发生电路
16  差动放大电路            17  放大电路
18  电流供给电路            19  电阻电路
20  相位补偿用电容
具体实施方式
以下,参照附图,就本发明的实施方式进行说明。
首先,对稳压器的结构进行说明。图1是表示稳压器的电路图。图2是表示电流供给电路及电阻电路的电路图。
稳压器具备输入端子10、接地端子11及输出端子12。此外,稳压器具备输出晶体管13、分压电路14、基准电压发生电路15、差动放大电路16、放大电路17、电流供给电路18、电阻电路19及相位补偿用电容20。
输出晶体管13的栅极与放大电路17的输出端子连接,源极与输入端子10连接,漏极与输出端子12连接。分压电路14设置在输出端子12和接地端子11之间。差动放大电路16的非反相输入端子与基准电压发生电路15的输出端子连接,反相输入端子与分压电路14的输出端子连接。放大电路17的输入端子与差动放大电路16的输出端子连接。电流供给电路18的输入端子与差动放大电路16的输出端子连接,输出端子与电阻电路19和相位补偿用电容20的连接点连接。相位补偿用电容20设置在电流供给电路18和电阻电路19的连接点与分压电路14的输出端子之间。
电流供给电路18具有PMOS晶体管30及NMOS晶体管31~32。
PMOS晶体管30的栅极与差动放大电路16的输出端子连接,源极与输入端子10连接。NMOS晶体管31的栅极及漏极与PMOS晶体管30的漏极连接,源极与接地端子11连接。NMOS晶体管32的栅极与NMOS晶体管31的栅极及漏极连接,源极与接地端子11连接,漏极与电阻40和相位补偿用电容20的连接点连接。即,NMOS晶体管31~32电流镜(current mirror)连接。
电阻电路19具有电阻40。
电阻40设置在输入端子10与NMOS晶体管32的漏极和相位补偿用电容20的连接点之间。
输出晶体管13基于放大电路17的输出电压及输入电压Vin,输出输出电压Vout。分压电路14被输入输出电压Vout后分压,输出分压电压Vfb。基准电压发生电路15发生基准电压Vref。差动放大电路16基于分压电压Vfb及基准电压Vref,控制输出晶体管13,使输出电压Vout成为一定的希望电压。放大电路17被输入差动放大电路16的输出电压后放大,输出输出电压。电流供给电路18基于差动放大电路16的输出电压,供给相位补偿用电流。电阻电路19基于相位补偿用电流,发生相位补偿用电压。相位补偿用电容20基于分压电压Vfb及相位补偿用电压,进行相位补偿。
PMOS晶体管30基于差动放大电路16的输出电压及输入电压Vin,输出相位补偿用电流。相位补偿用电流流入由NMOS晶体管31~32构成的电流镜电路,通过电流镜电路,从电阻40抽取与相位补偿用电流相同的电流。电阻40基于相位补偿用电流发生相位补偿用电压。
在此,流过PMOS晶体管30及电阻40的电流由差动放大电路16的输出电压来控制,因此限制在小于规定值。
此外,当输出晶体管13进行饱和动作时,PMOS晶体管30及NMOS晶体管31~32能够根据输出电压Vout进行动作,因此电阻40也能够根据输出电压Vout发生相位补偿用电压。即,不会发生现有的读出晶体管进行非饱和动作而相位补偿用电压不会基于输出电压Vout的现象。
接着,对稳压器的动作进行说明。
当输出电压Vout变高时,分压电压Vfb也变高。若分压电压Vfb高于基准电压Vref,则变高量得到放大,差动放大电路16的输出电压变低。变低量被反相放大,放大电路17的输出电压变高。这样,输出晶体管13的栅极电压也变高,输出晶体管13截止,输出电压Vout变低。因而,输出电压Vout被控制在一定的希望电压上。此时,基于差动放大电路16的输出电压,电流供给电路18向电阻电路19供给相位补偿用电流。基于相位补偿用电流,电阻电路19发生相位补偿用电压。相位补偿用电容20的一端上被供给相位补偿用电压,另一端上被供给分压电压Vfb,从而进行相位补偿。
在此,分压电压Vfb成为叠加经由差动放大电路16、放大电路17、输出晶体管13、分压电路14和差动放大电路16的信号与经由差动放大电路16、电流供给电路18、相位补偿用电容20和差动放大电路16的相位补偿用信号的电压。
此外,与上述同样地,即便输出电压Vout变低,输出电压Vout也被控制在一定的希望电压上。此时,与上述同样地,进行相位补偿。
这样,即使输入输出电压差小,在电阻电路19上也发生基于输出电压Vout的合理的相位补偿用电压,该合理的相位补偿用电压被供给相位补偿用电容20,因此稳压器能够进行合理的相位补偿。因而,稳压器难以振荡,所以能够稳定工作。
此外,在图2中,电阻40设置在输入端子10与NMOS晶体管32的漏极和相位补偿用电容20的连接点之间。但是,如图3所示,可以除去电阻40而设置二极管连接的PMOS晶体管50,该PMOS晶体管50的栅极及漏极与NMOS晶体管32的漏极和相位补偿用电容20的连接点连接,源极与输入端子10连接。

Claims (3)

1.一种稳压器,具备差动放大电路,该差动放大电路用于将输出晶体管所输出的电压进行分压后的分压电压与基准电压之差放大后输出,并控制所述输出晶体管的栅极,所述稳压器的特征在于包括:
设置在所述差动放大电路与所述输出晶体管之间的放大电路;
设置在所述差动放大电路的输出端子上,并供给相位补偿用电流的电流供给电路;
基于所述相位补偿用电流发生相位补偿用电压的电阻电路;以及
设置在所述电阻电路与所述分压电路的输出端子之间,并基于所述相位补偿用电压和所述分压电压进行相位补偿的相位补偿用电容。
2.如权利要求1所述的稳压器,其特征在于:所述电流供给电路具备第一晶体管,由所述差动放大电路的输出电压来控制该第一晶体管的栅极。
3.如权利要求1所述的稳压器,其特征在于:所述电阻电路具备连接栅极和漏极的第二晶体管。
CN2009101505106A 2008-06-09 2009-06-09 稳压器 Expired - Fee Related CN101604174B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2008150926A JP5160317B2 (ja) 2008-06-09 2008-06-09 ボルテージレギュレータ
JP2008-150926 2008-06-09
JP2008150926 2008-06-09

Publications (2)

Publication Number Publication Date
CN101604174A true CN101604174A (zh) 2009-12-16
CN101604174B CN101604174B (zh) 2013-05-01

Family

ID=41399707

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009101505106A Expired - Fee Related CN101604174B (zh) 2008-06-09 2009-06-09 稳压器

Country Status (5)

Country Link
US (1) US8085018B2 (zh)
JP (1) JP5160317B2 (zh)
KR (1) KR101274280B1 (zh)
CN (1) CN101604174B (zh)
TW (1) TWI480713B (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102915065A (zh) * 2011-08-05 2013-02-06 精工电子有限公司 稳压器
CN113050747A (zh) * 2019-12-26 2021-06-29 比亚迪半导体股份有限公司 基准电压电路

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5160317B2 (ja) * 2008-06-09 2013-03-13 セイコーインスツル株式会社 ボルテージレギュレータ
JP5280176B2 (ja) * 2008-12-11 2013-09-04 ルネサスエレクトロニクス株式会社 ボルテージレギュレータ
TWI413881B (zh) * 2010-08-10 2013-11-01 Novatek Microelectronics Corp 線性穩壓器及其電流感測電路
JP2014048681A (ja) * 2012-08-29 2014-03-17 Toshiba Corp 電源装置
CN103677046B (zh) * 2013-11-28 2015-07-15 成都岷创科技有限公司 高精度基准电压积分采样电路
US9246441B1 (en) * 2015-06-12 2016-01-26 Nace Engineering, Inc. Methods and apparatus for relatively invariant input-output spectral relationship amplifiers

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5686820A (en) * 1995-06-15 1997-11-11 International Business Machines Corporation Voltage regulator with a minimal input voltage requirement
US6049200A (en) * 1998-05-22 2000-04-11 Nec Corporation Voltage regulator capable of lowering voltage applied across phase compensating capacitor
US6498469B2 (en) * 2000-01-31 2002-12-24 Fujitsu Limited Internal supply voltage generating circuit and method of generating internal supply voltage using an internal reference voltage generating circuit and voltage-drop regulator
US20030235058A1 (en) * 2002-06-20 2003-12-25 Hitachi, Ltd. Semiconductor integrated circuit device
CN1487384A (zh) * 2002-07-26 2004-04-07 精工电子有限公司 电压调节器
US6856123B2 (en) * 2002-09-13 2005-02-15 Oki Electric Industry Co., Ltd. Semiconductor device provided with regulator circuit having reduced layout area and improved phase margin
US20050088153A1 (en) * 2003-09-08 2005-04-28 Toshio Suzuki Constant voltage power supply circuit
CN1667538A (zh) * 2004-01-28 2005-09-14 精工电子有限公司 电压调节器
JP2005316788A (ja) * 2004-04-30 2005-11-10 New Japan Radio Co Ltd 電源回路
JP2006134268A (ja) * 2004-11-09 2006-05-25 Nec Electronics Corp レギュレータ回路
WO2007129765A1 (en) * 2006-05-09 2007-11-15 Ricoh Company, Ltd. Constant voltage circuit

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001282372A (ja) * 2000-03-31 2001-10-12 Seiko Instruments Inc レギュレータ
JP2005115659A (ja) * 2003-10-08 2005-04-28 Seiko Instruments Inc ボルテージ・レギュレータ
JP4390620B2 (ja) 2004-04-30 2009-12-24 Necエレクトロニクス株式会社 ボルテージレギュレータ回路
US7248531B2 (en) * 2005-08-03 2007-07-24 Mosaid Technologies Incorporated Voltage down converter for high speed memory
KR101514459B1 (ko) * 2007-11-09 2015-04-22 세이코 인스트루 가부시키가이샤 볼티지 레귤레이터
JP5160317B2 (ja) * 2008-06-09 2013-03-13 セイコーインスツル株式会社 ボルテージレギュレータ
JP5594980B2 (ja) * 2009-04-03 2014-09-24 ピーエスフォー ルクスコ エスエイアールエル 非反転増幅回路及び半導体集積回路と非反転増幅回路の位相補償方法
JP5390932B2 (ja) * 2009-05-14 2014-01-15 セミコンダクター・コンポーネンツ・インダストリーズ・リミテッド・ライアビリティ・カンパニー 電源回路

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5686820A (en) * 1995-06-15 1997-11-11 International Business Machines Corporation Voltage regulator with a minimal input voltage requirement
US6049200A (en) * 1998-05-22 2000-04-11 Nec Corporation Voltage regulator capable of lowering voltage applied across phase compensating capacitor
US6498469B2 (en) * 2000-01-31 2002-12-24 Fujitsu Limited Internal supply voltage generating circuit and method of generating internal supply voltage using an internal reference voltage generating circuit and voltage-drop regulator
US20030235058A1 (en) * 2002-06-20 2003-12-25 Hitachi, Ltd. Semiconductor integrated circuit device
CN1487384A (zh) * 2002-07-26 2004-04-07 精工电子有限公司 电压调节器
US6856123B2 (en) * 2002-09-13 2005-02-15 Oki Electric Industry Co., Ltd. Semiconductor device provided with regulator circuit having reduced layout area and improved phase margin
US20050088153A1 (en) * 2003-09-08 2005-04-28 Toshio Suzuki Constant voltage power supply circuit
CN1667538A (zh) * 2004-01-28 2005-09-14 精工电子有限公司 电压调节器
JP2005316788A (ja) * 2004-04-30 2005-11-10 New Japan Radio Co Ltd 電源回路
JP2006134268A (ja) * 2004-11-09 2006-05-25 Nec Electronics Corp レギュレータ回路
WO2007129765A1 (en) * 2006-05-09 2007-11-15 Ricoh Company, Ltd. Constant voltage circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102915065A (zh) * 2011-08-05 2013-02-06 精工电子有限公司 稳压器
CN102915065B (zh) * 2011-08-05 2015-09-30 精工电子有限公司 稳压器
CN113050747A (zh) * 2019-12-26 2021-06-29 比亚迪半导体股份有限公司 基准电压电路
CN113050747B (zh) * 2019-12-26 2022-05-20 比亚迪半导体股份有限公司 基准电压电路

Also Published As

Publication number Publication date
JP5160317B2 (ja) 2013-03-13
KR20090127811A (ko) 2009-12-14
US20090302811A1 (en) 2009-12-10
TW201007415A (en) 2010-02-16
KR101274280B1 (ko) 2013-06-13
CN101604174B (zh) 2013-05-01
US8085018B2 (en) 2011-12-27
JP2009295119A (ja) 2009-12-17
TWI480713B (zh) 2015-04-11

Similar Documents

Publication Publication Date Title
CN101604174B (zh) 稳压器
CN106558987B (zh) 低静态电流线性调节器电路
CN100432886C (zh) 一种双环低压差线性稳压器电路
CN101807853B (zh) 稳压器
KR100991699B1 (ko) 정전압 회로 및 그 동작 제어 방법
US9146570B2 (en) Load current compesating output buffer feedback, pass, and sense circuits
CN103853222B (zh) 稳压器
CN101727119B (zh) 具有有效补偿的低压差线性电压源
CN205092772U (zh) 线性调节器控制电路
CN104699153B (zh) 低压差线性稳压器
CN102999075A (zh) 稳压器
CN101227146A (zh) 电压调节器
CN102915065A (zh) 稳压器
CN104750150A (zh) 稳压器及电子设备
TWI639909B (zh) 電壓調節器
CN104950970A (zh) 稳压器
CN104423408A (zh) 稳压器
CN104714585A (zh) 稳压器
KR102215287B1 (ko) 전압 제너레이터
CN101441489B (zh) 实现高psrr的集成电路及方法
JP6793772B2 (ja) 電圧ジェネレータ
CN100428613C (zh) 具有稳定快速响应和低待机电流的调压器用器件
CN102043416A (zh) 低压差线性稳压器
CN107305399B (zh) Pmos功率电晶体线性降压稳压电路
CN102736657B (zh) 电压调节器

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20160321

Address after: Chiba County, Japan

Patentee after: SEIKO INSTR INC

Address before: Chiba, Chiba, Japan

Patentee before: Seiko Instruments Inc.

CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: Chiba County, Japan

Patentee after: EPPs Lingke Co. Ltd.

Address before: Chiba County, Japan

Patentee before: SEIKO INSTR INC

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130501

Termination date: 20210609