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http://dx.doi.org/10.5762/KAIS.2011.12.6.2729

A Active Replica LDO Regulator with DC Matching Circuit  

Ryu, In-Ho (Dept. of IT Applied System Engineering)
Bang, Jun-Ho (Dept. of IT Applied System Engineering)
Yu, Jae-Young (Dept. of IT Applied System Engineering)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.12, no.6, 2011 , pp. 2729-2734 More about this Journal
Abstract
In this paper, an active replica Low-dropout(LDO) regulator with DC voltage matching circuit is presented. In order to match the voltage between replica and output of regulator, DC voltage matching circuit is designed. The active replica low dropout regulator has higher Power Supply Rejection(PSR) than that of conventional regulator. The designed DC voltage matching circuit can reduce the drawback that may be occurred in replica regulator. And using fully active element in regulator can reduce the chip area and heat noise with resistor. As results of HSPICE simulation with 0.35um CMOS parameter, the designed active replica LDO regulator achieves Power Supply Rejection, -28@10Hz better than -17@10Hz of conventional replica regulator without DC matching circuit. And the output voltage is 3V.
Keywords
LDO Regulator; Replica Regulator; PSRR; DC matching;
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