A high-efficiency PWM DC-DC buck converter with a novel DCM control under light-load

Author

Chia, Chu-Hsiang ; Lei, Pui-Sun ; Chang, Robert Chen-Hao

Author_Institution

Dept. of Electr. Eng., Nat. Chung Hsing Univ., Taichung, Taiwan

fYear

2011

fDate

15-18 May 2011

Firstpage

237

Lastpage

240

Abstract

This paper presents a high-efficiency PWM DC-DC buck converter with a novel discontinuous-conduction mode (DCM) control under light-load condition. It is designed by using TSMC 1.8/3.3 V 0.18 μm CMOS technology. The proposed PWM buck converter with DCM operation not only can reach high efficiency in heavy-load (over 95% at 100 mA loading), but also has great improvement in light-load efficiency (36.14% higher than the conventional PWM converter at 10 mA loading) without using any PFM techniques. The output accuracy and the output ripples are better than PFM converters under light-load, and as good as a normal PWM converter under heavy-load. The proposed PWM converter is designed at 1.8 V supply and IV output voltage, and the maximum output power is 500 mW.

Keywords

CMOS integrated circuits; DC-DC power convertors; PWM power convertors; CMOS technology; DCM control; PWM DC-DC buck converter; current 10 mA; current 100 mA; discontinuous conduction mode; light-load condition; power 500 mW; size 0.18 mum; voltage 1.8 V; voltage 3.3 V; CMOS integrated circuits; CMOS technology; Detectors; Loading; Pulse width modulation; Pulse width modulation converters; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2011 IEEE International Symposium on

Conference_Location

Rio de Janeiro

ISSN

0271-4302

Print_ISBN

978-1-4244-9473-6

Electronic_ISBN

0271-4302

Type

conf

DOI

10.1109/ISCAS.2011.5937545

Filename

5937545