Title :
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
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;
Conference_Titel :
Circuits and Systems (MWSCAS), 2010 53rd IEEE International Midwest Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-7771-5
DOI :
10.1109/MWSCAS.2010.5548810
