DocumentCode :
1841085
Title :
A high precision, output-capacitor-free low-dropout regulator for system-on-chip design
Author :
Leung, Wing Yan ; Man, Tsz Yin ; Chan, Wan Tim ; Chan, Mansun
Author_Institution :
Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong
fYear :
2008
fDate :
18-21 May 2008
Firstpage :
2242
Lastpage :
2245
Abstract :
An output-capacitor-free multi-stage low-dropout regulator (LDO) with new compensation scheme is presented. This scheme relieves the requirement of compensation capacitor to be 1.2 pF by making use of the large gate capacitance of pass transistor as a large on-chip compensation capacitor. With this compensation scheme, the LDO can employ a multi-stage error amplifier for precise line and load regulation (total line and load error < 0.04%) without sacrificing chip area and its bandwidth. Thus, recovery time of LDO is 1 mus upon a step-load change in between 1 mA and 100 mA. Its output-capacitor-free nature and high area-efficiency make it particularly attractive for system-on-chip (SoC) designs. Proposed LDO is fabricated in a 0.35 mum standard CMOS technology and measurement results confirm with analysis and simulation results.
Keywords :
CMOS integrated circuits; amplifiers; capacitors; integrated circuit design; system-on-chip; transistors; SoC; compensation scheme; large onchip compensation capacitor; multistage error amplifier; output-capacitor-free multistage low-dropout regulator; pass transistor; system-on-chip design; Bandwidth; CMOS technology; Capacitance; Capacitors; Frequency; Output feedback; Regulators; Stability; System-on-a-chip; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-1683-7
Electronic_ISBN :
978-1-4244-1684-4
Type :
conf
DOI :
10.1109/ISCAS.2008.4541899
Filename :
4541899
Link To Document :
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