A Low-dropout Regulator with Unconditional Stability and Low Quiescent Current
An unconditionally stable low-dropout regulator (LDO) with ultra low quiescent current is presented. By using frequency compensation of dynamic miller on the LDOs structure, the proposed LDOs stability is independent of the load or off-chip capacitor. The LDO works at a low quiescent current of approximately 4μA. Low quiescent current is due to a precision CMOS current reference, which operates in subthreshold region and generates 30nA bias current. The current reference has max-to-min fluctuation of less than 2.5％ over a temperature range of -40 ℃to 150℃. The proposed LDO has been implemented in a 0.5-μm CMOS technology. The experimental results revealed that the LDO provides a full load transient response of less than 50μs setting time and less than 75mV overshoots and undershoots. Moreover, the dropout voltage is 170mV at 150mA loading, and quiescent current is 4.17μA when output current is 150mA.
Dongpo Chen Lenian He Xiaolang Yan
Department of Electrical and Electronic Engineering The Zhejiang University Hangzhou, Zhejiang, China
国际会议
2006 International Conference on Communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)
广西桂林
英文
2215-2218
2006-06-25（万方平台首次上网日期，不代表论文的发表时间）