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NCUEIR > College of Engineering > Department and Graduate Institute of Computer Science and Information Engineering > Proceedings > Item 987654321/11666

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/11666

Title:	A high current efficiency rail-to-rail buffer for low drop-out regulators with load regulation-enhanced
Authors:	Peng, Guang-Yu;Wei, Kai-Cheng
Contributors:	資訊工程系
Keywords:	Low-dropout regulator (LDO);Rail-to-rail buffer;Current-efficiency;Drop-out voltage
Date:	2011-04
Issue Date:	2012-06-18T02:34:57Z
Publisher:	IEEE
Abstract:	A 1.8-V 250-mA CMOS low-dropout regulator (LDO) with a current-efficiency rail-to-rail buffer to enhance load regulation is presented. The proposed buffer provides a push-pull output stage for driving pass device and pushes the parasitic pole far beyond the unity-gain frequency to improve phase margin of the LDO loop response. The proposed LDO has been implemented in a 0.35-μm CMOS process technology and occupies area of 0.735-mm2. The measurement results show that the LDO with the proposed buffer dissipates 40-μA quiescent current and a maximum drop-out voltage of 200-mV at 250-mA output load. The output voltage drop with a 1-μF off chip capacitor for a 250-mA load step is less than 25-mV. The proposed LDO is able to provide excellent agreement between theoretical and measurement results.
Relation:	2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011, Hsinchu; April 25-28, 2011: 370-373
Appears in Collections:	[Department and Graduate Institute of Computer Science and Information Engineering] Proceedings

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