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EP1109088A1 - Spannungsregler mit Vorscholttransistor und Strombegrenzung - Google Patents

Spannungsregler mit Vorscholttransistor und Strombegrenzung Download PDF

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Publication number
EP1109088A1
EP1109088A1 EP00403489A EP00403489A EP1109088A1 EP 1109088 A1 EP1109088 A1 EP 1109088A1 EP 00403489 A EP00403489 A EP 00403489A EP 00403489 A EP00403489 A EP 00403489A EP 1109088 A1 EP1109088 A1 EP 1109088A1
Authority
EP
European Patent Office
Prior art keywords
voltage
transistor
output
ballast
circuit
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.)
Withdrawn
Application number
EP00403489A
Other languages
English (en)
French (fr)
Inventor
Claude Renous
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.)
STMicroelectronics SA
Original Assignee
STMicroelectronics SA
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 STMicroelectronics SA filed Critical STMicroelectronics SA
Publication of EP1109088A1 publication Critical patent/EP1109088A1/de
Withdrawn legal-status Critical Current

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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
    • 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
    • G05F1/5735—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 with foldback current limiting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S323/00—Electricity: power supply or regulation systems
    • Y10S323/908—Inrush current limiters

Definitions

  • the present invention relates to a voltage regulator with ballast transistor and current limiter. It applies in particular to integrated regulators and in particular those designed according to HCMOS technology.
  • a transistor voltage regulator ballast includes a transistor (called passage or ballast) arranged in series between the inlet and the outlet of the regulator.
  • a transistor called passage or ballast
  • Such a regulator operates in using for example a voltage reference to potential barrier.
  • the output voltage is regulated by feedback.
  • Such a voltage regulator is well known in the prior art, especially for build integrated regulators.
  • a short circuit occurs between the regulator output terminals, the input voltage of the regulator is found at the terminals of the ballast transistor which can be destroyed due to the excessive current crossing it.
  • a current limiting circuit including a low value resistor (e.g. 1 ⁇ ) in series with the ballast transistor.
  • HCMOS technology was developed for increase the integration density of circuits integrated.
  • An integrated regulator made using the same technology must provide a regulated voltage of 3.3 V for an input voltage of 5 V.
  • the ballast transistor supports between its terminals a maximum voltage of 5 V. In the event of a short circuit in output of the regulator, the ballast transistor must be able to be protected very quickly and particularly effective.
  • the present invention has been designed for provide rapid and effective protection ballast transistor of such a power supply.
  • the reaction circuits of the parties voltage regulator and current limiter can each include a resistor voltage divider.
  • the regulator can include a differential amplifier including one input of a determined sign receives said voltage from reference, a first entry of sign opposite to the determined sign input receiving said voltage of reaction corresponding to the regulatory part of voltage, the output voltage of the amplifier differential controlling the ballast transistor, the reaction voltage corresponding to the limiter part of current being supplied to a second sign input opposite to the specified sign input of the amplifier differential including a fraction of the output voltage is taken to supply a control voltage to the control means of the current limiting transistor.
  • the control means may include a comparator one of whose inputs receives a reference voltage, a second input receiving said control voltage, the comparator output controlling the transistor arranged in series of the part current limiter. The output voltage fraction can be taken by a transistor dimensioned in consequence compared to the ballast transistor.
  • This regulator can be realized according to the HCMOS technology.
  • Figure 1 is an electrical diagram of a voltage regulator with current limiter according to the invention.
  • This regulator is intended to regulate a input voltage Ve, which can vary between 4 V and 5.5 V, and to supply an output voltage Vs of 3.3 V to a load RL. It uses transistors produced according to the HCMOS 6 technology supporting a limit voltage of 3.6 V.
  • the regulator circuit includes a part forming a voltage regulator comprising the T1 ballast transistor and a differential amplifier A.
  • the ballast transistor T1 is a PMOS transistor whose the source is connected to the substrate. Leaving the part forming voltage regulator delivers a voltage VS1 to a voltage divider bridge formed by resistors R1 and R2. The common point between resistors R1 and R2 is connected to an input not reversing of the differential amplifier A of which the inverting input is connected to the voltage of reference Vref.
  • the differential amplifier A is supplied between the input voltage Ve and the circuit earth. he includes two parallel branches connected to a current generator Ipol which polarizes the amplifier.
  • a first branch includes T2 and T3 transistors arranged in series.
  • a second branch includes a transistor T4 arranged in series with transistors T5 and T6 arranged in parallel.
  • the transistors T2 and T4 are PMOS transistors forming a current mirror, their grid being connected and each having its source connected to substrate.
  • the transistors T3, T5 and T6 are NMOS transistors with common substrate and whose sources are connected to the Ipol current generator. Grid of transistor T3 constitutes the inverting input of differential amplifier A while the gates transistors T5 and T6 constitute two inputs not inverters for this differential amplifier. The common point between resistors R1 and R2 is connected to the gate of transistor T6.
  • the current limiter part includes a transistor T7 connected in series between the transistor ballast and regulator output.
  • This transistor T7 is a PMOS transistor whose source is connected to the substrate.
  • the drain of transistor T1 is therefore located connected to the source of transistor T7.
  • the drain of transistor T7 constitutes the regulator output.
  • a voltage divider bridge formed resistors R3 and R4 is connected between the output regulator and ground.
  • the common point between resistors R3 and R4 is connected to the other input no inverter of the differential amplifier A, that is to say to the gate of transistor T5.
  • the output of a comparator C is connected to the gate of the transistor T7.
  • the minus input of this comparator is connected to the voltage Vref while its plus input is connected to the point Ll.
  • the point L1 is common to the drain of the transistor PMOS T8 and Ilim power source.
  • the source of transistor T8, which is connected to the substrate, is also connected to the input voltage Ve.
  • the exit of the differential amplifier A is connected to the grids of transistors T1 and T8.
  • the output of comparator C is at zero volts.
  • the transistor T7 is conductor and works in a linear zone.
  • the difference VS1 - Vs must be less than 200 mV so that the voltage regulation is carried out by the resistive bridge R3 - R4.
  • the voltage at point L1 becomes greater than Vref and the voltage VC at the output of comparator C becomes equal to VS1.
  • the transistor T7 is then regulated according to the load RL so as to regulate the current so that the voltage at point L1 becomes equal to Vref.
  • the voltage Vs drops from 3.3 V to zero according to the limitation characteristic.
  • the voltage regulation VS1 is then carried out by the ratio R1, R2 because the voltage VS falls below 3.3 V.
  • the invention therefore allows regulation on the load in normal mode and, in the limitation mode of current regulation on voltage VS1.
  • the differential transistors T5 and T6 perform the switching continuously between the two modes.
  • FIG. 2 represents a diagram of which the ordinate axis represents the voltage in volts and the x-axis time in milliseconds.
  • the diagram shows the effectiveness of regulator according to the invention. We see that when the VS voltage drops suddenly, the VC voltage at the output of comparator C suddenly shows. The return to normal situation happens just as quickly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
EP00403489A 1999-12-13 2000-12-12 Spannungsregler mit Vorscholttransistor und Strombegrenzung Withdrawn EP1109088A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9915668 1999-12-13
FR9915668A FR2802315B1 (fr) 1999-12-13 1999-12-13 Regulateur de tension a transistor ballast et a limiteur de courant

Publications (1)

Publication Number Publication Date
EP1109088A1 true EP1109088A1 (de) 2001-06-20

Family

ID=9553164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00403489A Withdrawn EP1109088A1 (de) 1999-12-13 2000-12-12 Spannungsregler mit Vorscholttransistor und Strombegrenzung

Country Status (3)

Country Link
US (1) US6346799B2 (de)
EP (1) EP1109088A1 (de)
FR (1) FR2802315B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1857906A1 (de) * 2006-05-15 2007-11-21 St Microelectronics S.A. Linearspannungsregler und Verfahren zur Begrenzung des Stroms in einem solchen Regler
CN109144157A (zh) * 2017-06-19 2019-01-04 硅实验室公司 具有反馈路径的电压调节器

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100395678C (zh) * 2004-12-28 2008-06-18 中芯国际集成电路制造(上海)有限公司 带有改进电源范围的低功率快响应稳压器的器件与方法
US8045353B2 (en) * 2005-12-30 2011-10-25 Stmicroelectronics Pvt. Ltd. Integrated circuit capable of operating at different supply voltages
US20080030177A1 (en) * 2006-08-01 2008-02-07 Hung-I Chen Soft-start circuit of linear voltage regulator and method thereof
US8754620B2 (en) * 2009-07-03 2014-06-17 Stmicroelectronics International N.V. Voltage regulator
US9041367B2 (en) 2013-03-14 2015-05-26 Freescale Semiconductor, Inc. Voltage regulator with current limiter
US11378993B2 (en) 2020-09-23 2022-07-05 Microsoft Technology Licensing, Llc Voltage regulator circuit with current limiter stage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4816740A (en) * 1988-01-19 1989-03-28 Hewlett-Packard Company Mode optimized D.C. power supply
US5355077A (en) * 1992-04-27 1994-10-11 Dell U.S.A., L.P. High efficiency regulator with shoot-through current limiting
US5408173A (en) * 1992-10-01 1995-04-18 Kronos Incorporated Manual-adjustment-free controlled-voltage and current-limited D.C. voltage supply
US5861737A (en) * 1996-07-31 1999-01-19 Data General Corporation Soft-start switch with voltage regulation and current limiting

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1245421B (it) * 1991-02-27 1994-09-20 Sgs Thomson Microelectronics Regolatore di tensione a bassa caduta
US5336986A (en) * 1992-02-07 1994-08-09 Crosspoint Solutions, Inc. Voltage regulator for field programmable gate arrays
US5548205A (en) * 1993-11-24 1996-08-20 National Semiconductor Corporation Method and circuit for control of saturation current in voltage regulators
US5559424A (en) * 1994-10-20 1996-09-24 Siliconix Incorporated Voltage regulator having improved stability
EP0864956A3 (de) * 1997-03-12 1999-03-31 Texas Instruments Incorporated Spannungsregler mit niedrigem Spannungsabfall
DE69732699D1 (de) * 1997-08-29 2005-04-14 St Microelectronics Srl Linearer Spannungsregler mit geringem Verbrauch und hoher Versorgungsspannungsunterdrückung
JP3456904B2 (ja) * 1998-09-16 2003-10-14 松下電器産業株式会社 突入電流抑制手段を備えた電源回路、およびこの電源回路を備えた集積回路

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4816740A (en) * 1988-01-19 1989-03-28 Hewlett-Packard Company Mode optimized D.C. power supply
US5355077A (en) * 1992-04-27 1994-10-11 Dell U.S.A., L.P. High efficiency regulator with shoot-through current limiting
US5408173A (en) * 1992-10-01 1995-04-18 Kronos Incorporated Manual-adjustment-free controlled-voltage and current-limited D.C. voltage supply
US5861737A (en) * 1996-07-31 1999-01-19 Data General Corporation Soft-start switch with voltage regulation and current limiting

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1857906A1 (de) * 2006-05-15 2007-11-21 St Microelectronics S.A. Linearspannungsregler und Verfahren zur Begrenzung des Stroms in einem solchen Regler
CN109144157A (zh) * 2017-06-19 2019-01-04 硅实验室公司 具有反馈路径的电压调节器
CN109144157B (zh) * 2017-06-19 2021-02-09 硅实验室公司 具有反馈路径的电压调节器

Also Published As

Publication number Publication date
FR2802315A1 (fr) 2001-06-15
FR2802315B1 (fr) 2002-03-01
US6346799B2 (en) 2002-02-12
US20010005129A1 (en) 2001-06-28

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