TW200744295A - Voltage regulator having current canceling compensation - Google Patents

Voltage regulator having current canceling compensation

Info

Publication number
TW200744295A
TW200744295A TW095137301A TW95137301A TW200744295A TW 200744295 A TW200744295 A TW 200744295A TW 095137301 A TW095137301 A TW 095137301A TW 95137301 A TW95137301 A TW 95137301A TW 200744295 A TW200744295 A TW 200744295A
Authority
TW
Taiwan
Prior art keywords
error amplifier
output
inverting input
network
pwm
Prior art date
Application number
TW095137301A
Other languages
Chinese (zh)
Other versions
TWI325679B (en
Inventor
Robert H Isham
Original Assignee
Intersil 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 Intersil Inc filed Critical Intersil Inc
Publication of TW200744295A publication Critical patent/TW200744295A/en
Application granted granted Critical
Publication of TWI325679B publication Critical patent/TWI325679B/en

Links

Landscapes

  • Dc-Dc Converters (AREA)
  • Amplifiers (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

A voltage regulator which includes a network for improved compensation for reference voltage changes includes an IC including an error amplifier and a pulse width modulator (PWM), wherein an input of the PWM is coupled to an output of the error amplifier. A low pass filter comprising an inductor is in series with a grounded capacitor coupled to an output of the PWM, wherein an output of the regulator (VOUT) is at a node between the inductor and the capacitor. A first feedback network is disposed between VOUT and inverting input of the error amplifier and a second feedback network is disposed between an output of the error amplifier and the inverting input of the error amplifier. A current cancellation network is coupled to the inverting input of the error amplifier. The current cancellation network injects a canceling current into the inverting input that is substantially equal in magnitude and opposite in polarity to current flowing through the second feedback network triggered by a change in reference voltage when applied to the error amplifier.
TW95137301A 2006-05-24 2006-10-11 Voltage regulator and method of current cancellation for a voltage regulator TWI325679B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80294906P 2006-05-24 2006-05-24

Publications (2)

Publication Number Publication Date
TW200744295A true TW200744295A (en) 2007-12-01
TWI325679B TWI325679B (en) 2010-06-01

Family

ID=38906860

Family Applications (1)

Application Number Title Priority Date Filing Date
TW95137301A TWI325679B (en) 2006-05-24 2006-10-11 Voltage regulator and method of current cancellation for a voltage regulator

Country Status (2)

Country Link
CN (1) CN101079577B (en)
TW (1) TWI325679B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI456882B (en) * 2010-06-25 2014-10-11 Richtek Technology Corp Voltage regulator and control circuit and method therefor
TWI473397B (en) * 2012-11-01 2015-02-11 Luxmill Electronic Co Ltd Current control circuit and control method for a power converter
CN106300917A (en) * 2016-10-09 2017-01-04 深圳市钜能科技有限公司 Negative-feedback circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264782A (en) * 1992-08-10 1993-11-23 International Business Machines Corporation Dropout recovery circuit
US6181120B1 (en) * 1999-09-01 2001-01-30 Intersil Corporation Current mode dc/dc converter with controlled output impedance
US6388451B1 (en) * 2000-08-16 2002-05-14 Ford Global Technologies, Inc. Leakage current cancellation device
US6437999B1 (en) * 2001-05-12 2002-08-20 Technical Witts, Inc. Power electronic circuits with ripple current cancellation

Also Published As

Publication number Publication date
CN101079577B (en) 2012-05-16
CN101079577A (en) 2007-11-28
TWI325679B (en) 2010-06-01

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees