JP7031983B2 - ボルテージレギュレータ - Google Patents
ボルテージレギュレータ Download PDFInfo
- Publication number
- JP7031983B2 JP7031983B2 JP2018060314A JP2018060314A JP7031983B2 JP 7031983 B2 JP7031983 B2 JP 7031983B2 JP 2018060314 A JP2018060314 A JP 2018060314A JP 2018060314 A JP2018060314 A JP 2018060314A JP 7031983 B2 JP7031983 B2 JP 7031983B2
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- JP
- Japan
- Prior art keywords
- transistor
- voltage
- output
- circuit
- gate
- 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.)
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic 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
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/56—Regulating 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
- G05F1/565—Regulating 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 sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/569—Regulating 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 sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
- G05F1/573—Regulating 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 sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic 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
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/56—Regulating 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
- G05F1/565—Regulating 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 sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/569—Regulating 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 sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
- G05F1/571—Regulating 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 sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overvoltage detector
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic 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
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/56—Regulating 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/025—Current limitation using field effect transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0822—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in field-effect transistor switches
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Control Of Eletrric Generators (AREA)
- Semiconductor Integrated Circuits (AREA)
Description
図1は、本発明の実施形態のボルテージレギュレータを示す回路図である。
誤差増幅回路2は、反転入力端子が基準電圧回路5の正極に接続され、非反転入力端子が抵抗回路6の出力端子に接続される。基準電圧回路5は、負極がグラウンド端子10に接続される。PMOSトランジスタ3は、ゲートが誤差増幅回路2の出力端子に接続され、ソースが電源端子11に接続され、ドレインが出力端子12に接続される。過電流保護回路4と保護回路7は、PMOSトランジスタ3のゲートに接続される。抵抗回路6は、出力端子12とグラウンド端子10の間に接続される。NMOSトランジスタ8は、ゲートとソースがグラウンド端子10に接続され、ドレインが出力端子12に接続される。
電源端子11に電源電圧VDDが入力されると、PMOSトランジスタ3は、出力端子12から出力電圧Voutを出力する。誤差増幅回路2は、基準電圧回路5の基準電圧Vrefと出力電圧Voutに基づく帰還電圧を比較し、帰還電圧が基準電圧Vrefに近づくようPMOSトランジスタ3のゲート電圧を制御する。
定常動作時において、出力端子12の電圧Voutは、所望の電圧になっているので、グラウンド端子10の電圧よりも高い。寄生バイポーラトランジスタ24は、ベースよりエミッタの電圧が高いので、ベース電流及びコレクタ電流は流れない。従って、PMOSトランジスタ73は、ゲートが電源端子11の電圧VDDにクランプされるので、オフしている。
例えば、クランプ回路である抵抗素子72は、電流源や、ダイオード接続されたMOSトランジスタを用いても良い。
4 過電流保護回路
5 基準電圧回路
7 保護回路
20 P型基板
21、22、23 N型領域
24 寄生バイポーラトランジスタ
Claims (3)
- 出力トランジスタが出力端子に出力する出力電圧に基づく電圧と基準電圧の差を増幅した電圧で、前記出力トランジスタのゲートを制御する誤差増幅回路と、
前記出力トランジスタの過電流を検出すると、前記出力トランジスタのゲート電圧を制御して過電流を防止する過電流保護回路と、
前記出力端子が負電圧になったときに、前記出力トランジスタのゲート電圧を制御して過電流を防止する保護回路と、
前記出力端子に接続されたN型領域を有する保護素子と、を備え、
前記保護回路は、前記出力トランジスタのゲートを制御するMOSトランジスタと、前記MOSトランジスタのゲートに接続されたクランプ回路と、前記クランプ回路に接続されたN型領域を有する半導体素子と、前記保護素子のN型領域をエミッタ、P型基板をベース、前記半導体素子のN型領域をコレクタ、とする寄生バイポーラトランジスタと、を備え、
前記半導体素子は、前記保護素子の近傍に配置された
ことを特徴とするボルテージレギュレータ。 - 前記クランプ回路は、抵抗素子、または電流源、またはダイオード接続されたMOSトランジスタである
ことを特徴とする請求項1に記載のボルテージレギュレータ。 - 前記N型領域を有する半導体素子は、ダイオード、またはトランジスタである
ことを特徴とする請求項1または2に記載のボルテージレギュレータ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018060314A JP7031983B2 (ja) | 2018-03-27 | 2018-03-27 | ボルテージレギュレータ |
TW108105856A TWI778230B (zh) | 2018-03-27 | 2019-02-21 | 電壓調整器 |
KR1020190021234A KR102595984B1 (ko) | 2018-03-27 | 2019-02-22 | 볼티지 레귤레이터 |
US16/289,189 US10831219B2 (en) | 2018-03-27 | 2019-02-28 | Voltage regulator |
CN201910151666.XA CN110308756B (zh) | 2018-03-27 | 2019-02-28 | 电压调节器 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018060314A JP7031983B2 (ja) | 2018-03-27 | 2018-03-27 | ボルテージレギュレータ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2019174976A JP2019174976A (ja) | 2019-10-10 |
JP7031983B2 true JP7031983B2 (ja) | 2022-03-08 |
Family
ID=68057007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2018060314A Active JP7031983B2 (ja) | 2018-03-27 | 2018-03-27 | ボルテージレギュレータ |
Country Status (5)
Country | Link |
---|---|
US (1) | US10831219B2 (ja) |
JP (1) | JP7031983B2 (ja) |
KR (1) | KR102595984B1 (ja) |
CN (1) | CN110308756B (ja) |
TW (1) | TWI778230B (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11258250B2 (en) * | 2018-12-04 | 2022-02-22 | Synaptics Incorporated | Over current protection with improved stability systems and methods |
JP7324016B2 (ja) * | 2019-03-07 | 2023-08-09 | ローム株式会社 | 半導体装置 |
US11495960B2 (en) * | 2019-03-07 | 2022-11-08 | Rohm Co., Ltd. | Semiconductor device |
US11451145B2 (en) | 2021-01-05 | 2022-09-20 | Monolithic Power Systems, Inc. | Trans-inductor voltage regulator with nonlinear compensation inductor |
JP2023071429A (ja) * | 2021-11-11 | 2023-05-23 | 株式会社東芝 | 電源回路、及び半導体装置 |
CN115202425B (zh) * | 2022-09-15 | 2022-11-22 | 成都市易冲半导体有限公司 | 串行通信总线超低电源电压检测的io设计电路及方法 |
Citations (4)
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US20060043945A1 (en) | 2004-08-27 | 2006-03-02 | Samsung Electronics Co., Ltd. | Power regulator having over-current protection circuit and method of providing over-current protection thereof |
JP2011096231A (ja) | 2009-09-30 | 2011-05-12 | Seiko Instruments Inc | ボルテージレギュレータ |
JP2013156926A (ja) | 2012-01-31 | 2013-08-15 | Seiko Instruments Inc | ボルテージレギュレータ |
JP2014026457A (ja) | 2012-07-26 | 2014-02-06 | Seiko Instruments Inc | ボルテージレギュレータ |
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-
2018
- 2018-03-27 JP JP2018060314A patent/JP7031983B2/ja active Active
-
2019
- 2019-02-21 TW TW108105856A patent/TWI778230B/zh active
- 2019-02-22 KR KR1020190021234A patent/KR102595984B1/ko active Active
- 2019-02-28 US US16/289,189 patent/US10831219B2/en active Active
- 2019-02-28 CN CN201910151666.XA patent/CN110308756B/zh active Active
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US20060043945A1 (en) | 2004-08-27 | 2006-03-02 | Samsung Electronics Co., Ltd. | Power regulator having over-current protection circuit and method of providing over-current protection thereof |
JP2011096231A (ja) | 2009-09-30 | 2011-05-12 | Seiko Instruments Inc | ボルテージレギュレータ |
JP2013156926A (ja) | 2012-01-31 | 2013-08-15 | Seiko Instruments Inc | ボルテージレギュレータ |
JP2014026457A (ja) | 2012-07-26 | 2014-02-06 | Seiko Instruments Inc | ボルテージレギュレータ |
Also Published As
Publication number | Publication date |
---|---|
CN110308756B (zh) | 2022-03-01 |
JP2019174976A (ja) | 2019-10-10 |
KR20190113551A (ko) | 2019-10-08 |
KR102595984B1 (ko) | 2023-10-30 |
US10831219B2 (en) | 2020-11-10 |
US20190302816A1 (en) | 2019-10-03 |
TWI778230B (zh) | 2022-09-21 |
TW201942698A (zh) | 2019-11-01 |
CN110308756A (zh) | 2019-10-08 |
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