A high efficiency current-mode DC-DC step-down converter with wide range of output current

Author

Chen, Chia-Min ; Hsu, Kai-Hsiu ; Hung, Chung-Chih

Author_Institution

Dept. of Electr. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

fYear

2010

Firstpage

1009

Lastpage

1012

Abstract

This paper presents a high efficiency current-mode DC-DC step-down converter with wide range of output current. The converter adaptively operates as Pulse-Width Modulation (PWM). An on-chip current sensing technique is employed to reduce external components and no extra I/O pins are needed for the current-mode controller. A soft-start operation is designed to eliminate the excess large current during the startup of the regulator. The circuit has been designed with TSMC 2P4M 0.35 μm CMOS process. The range of the supply voltage is from 2 to 5V, which is suitable for single-cell lithium-ion battery.

Keywords

CMOS integrated circuits; DC-DC power convertors; current-mode circuits; pulse width modulation; TSMC 2P4M CMOS process; current-mode controller; high efficiency current-mode DC-DC step-down converter; on-chip current sensing; output current; pulse-width modulation; single-cell lithium-ion battery; size 0.35 mum; soft-start operation; voltage 2 V to 5 V; Capacitors; Circuits; DC-DC power converters; Photonic band gap; Pulse amplifiers; Pulse width modulation; Pulse width modulation converters; Switching converters; Temperature; Voltage control; DC-DC converter; current-mode controller; current-sensing circuit; pulse-width modulation(PWM); switchmode power converter;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2010 53rd IEEE International Midwest Symposium on

Conference_Location

Seattle, WA

ISSN

1548-3746

Print_ISBN

978-1-4244-7771-5

Type

conf

DOI

10.1109/MWSCAS.2010.5548810

Filename

5548810