Title :
The Analysis of LDO and the Stability of Loop Compensation
Author :
Wang, Xuewen ; Wang, Fengge ; Li, Zhongwei
Author_Institution :
Inst. of Microelectron., Northwest Univ., Xi´´an, China
Abstract :
This paper discusses loop compensation methods of LDO. We especially analyze the LDO loop op-amp module, PMOS adjustment module, resistor feedback module. Moreover, the zero-pole compensation, feed-forward compensation and ESR compensation are adopted simultaneously to compensate LDO. This article simulates the designed LDO system with the CSMC 0.5um CMOS technical model. The system can meet the stability requirements under the load capacitance of 0.1uF.
Keywords :
CMOS integrated circuits; operational amplifiers; voltage regulators; CMOS; ESR compensation; LDO loop op-amp module; PMOS adjustment module; capacitance 0.1 muF; feed-forward compensation; loop compensation stability; low dropout voltage regulator; resistor feedback module; size 0.5 micron; zero-pole compensation; Capacitors; Circuit stability; Integrated circuit modeling; Load modeling; Poles and zeros; Resistance; Stability analysis; ESR Compensation; LDO; Miller compensation; feed-forward compensation; stability of compensation;
Conference_Titel :
Electrical and Control Engineering (ICECE), 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6880-5
DOI :
10.1109/iCECE.2010.1061
