article

Enhanced active feedback technique with dynamic compensation for low-dropout voltage regulator

Authors:

Chung-Chih HungAuthors Info & Claims

Analog Integrated Circuits and Signal Processing, Volume 75, Issue 1

Pages 97 - 108

https://doi.org/10.1007/s10470-013-0034-x

Published: 01 April 2013 Publication History

Abstract

This paper presents a novel frequency compensation technique for a low-dropout (LDO) voltage regulator. Enhanced active feedback frequency compensation is employed to improve the frequency response. The proposed LDO is capable of providing high stability for current loads up to 150 mA with or without loading capacitors. The proposed LDO voltage regulator provides a loop bandwidth of 7.8 MHz under light loads and 6.5 MHz under heavy loads. The maximum undershoot and overshoot are 59 and 90 mV, respectively, for changes in load current within a 200-ns edge time, while the compensation capacitors only require a total value of 7 pF. This enables easy integration of the compensation capacitors within the LDO chip. The proposed LDO regulator was designed using TSMC 0.35-μm CMOS technology. With an active area of 0.14 mm² (including feedback resistors), the quiescent current is only 40 μA. The input voltage ranges from 1.73 to 5 V for a loading current of 150 mA and an output voltage of 1.5 V. The main advantage of this approach is the stability of the LDO circuit when external load capacitors are connected, or even without load capacitors.

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Cited By

Yosef-Hay YLarsen DMuntal PJØrgensen I(2017)Fully integrated, low drop-out linear voltage regulator in 180 nm CMOSAnalog Integrated Circuits and Signal Processing10.1007/s10470-017-1012-592:3(427-436)Online publication date: 1-Sep-2017
https://dl.acm.org/doi/10.1007/s10470-017-1012-5
Yeo JJaved KLee JRoh JPark J(2017)A capacitorless low-dropout regulator with enhanced slew rate and 4.5-$$\upmu \hbox {A}$$μA quiescent currentAnalog Integrated Circuits and Signal Processing10.1007/s10470-016-0869-z90:1(227-235)Online publication date: 1-Jan-2017
https://dl.acm.org/doi/10.1007/s10470-016-0869-z
Qu XZhou ZZhang B(2014)A fast-transient high-PSR output-capacitor-free low-dropout regulator for low-power embedded systemsAnalog Integrated Circuits and Signal Processing10.1007/s10470-014-0405-y81:2(443-451)Online publication date: 1-Nov-2014
https://dl.acm.org/doi/10.1007/s10470-014-0405-y
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Enhanced active feedback technique with dynamic compensation for low-dropout voltage regulator
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cover image Analog Integrated Circuits and Signal Processing

Analog Integrated Circuits and Signal Processing Volume 75, Issue 1

April 2013

185 pages

ISSN:0925-1030

Issue’s Table of Contents

Copyright © Copyright © 2013 Springer Science+Business Media New York.

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Kluwer Academic Publishers

United States

Publication History

Published: 01 April 2013

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Cited By

Yosef-Hay YLarsen DMuntal PJØrgensen I(2017)Fully integrated, low drop-out linear voltage regulator in 180 nm CMOSAnalog Integrated Circuits and Signal Processing10.1007/s10470-017-1012-592:3(427-436)Online publication date: 1-Sep-2017
https://dl.acm.org/doi/10.1007/s10470-017-1012-5
Yeo JJaved KLee JRoh JPark J(2017)A capacitorless low-dropout regulator with enhanced slew rate and 4.5-$$\upmu \hbox {A}$$μA quiescent currentAnalog Integrated Circuits and Signal Processing10.1007/s10470-016-0869-z90:1(227-235)Online publication date: 1-Jan-2017
https://dl.acm.org/doi/10.1007/s10470-016-0869-z
Qu XZhou ZZhang B(2014)A fast-transient high-PSR output-capacitor-free low-dropout regulator for low-power embedded systemsAnalog Integrated Circuits and Signal Processing10.1007/s10470-014-0405-y81:2(443-451)Online publication date: 1-Nov-2014
https://dl.acm.org/doi/10.1007/s10470-014-0405-y
Qu XZhou ZZhang B(2014)A fully on-chip 1-μW capacitor-free low-dropout regulator with adaptive output stageAnalog Integrated Circuits and Signal Processing10.1007/s10470-013-0223-778:2(353-360)Online publication date: 1-Feb-2014
https://dl.acm.org/doi/10.1007/s10470-013-0223-7

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