Design and implementation of high-efficiency and low-power DC-DC converter with PWM/PFM modes

Author

Wang, Jing ; Gong, Wenchao ; He, Lenian

Author_Institution

Zhejiang Univ., Hangzhou

fYear

2007

fDate

22-25 Oct. 2007

Firstpage

596

Lastpage

599

Abstract

A high-efficiency low-power multimode DC-DC converter with pulse-width modulation (PWM) and pulse-frequency modulation (PFM) is proposed. This converter works in PWM mode on heavy load condition. In order to improve efficiency, it switches to PFM mode on light load condition. With suitable control and mode switch method, both simulation and chip test results indicate that the converter performs seamless switching between PWM and PFM modes. The total output voltage error, including line and load regulation, is less than plusmn2%, the maximum quiescent current is less than 15 muA, the maximum of efficiency reaches 92.6%. Simulated and implemented in CSMC 0.5 mum CMOS process.

Keywords

CMOS integrated circuits; DC-DC power convertors; PWM power convertors; CMOS process; PWM-PFM modes; low-power DC-DC converter; mode switch method; pulse-frequency modulation; pulse-width modulation; DC-DC power converters; Inductors; Power transistors; Pulse width modulation; Pulse width modulation converters; Switches; Switching converters; Switching frequency; Switching loss; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2007. ASICON '07. 7th International Conference on

Conference_Location

Guilin

Print_ISBN

978-1-4244-1132-0

Electronic_ISBN

978-1-4244-1132-0

Type

conf

DOI

10.1109/ICASIC.2007.4415701

Filename

4415701