Title :
Design of the dual mode DC-DC buck converter using low power control method
Author :
Lim, Dong-kyun ; Park, Seung-chan ; Won Kim ; Hwang, Jung-jin ; Jung, Hak-jin ; Park, Li-min ; Yoon, Kwang-sub
Author_Institution :
Dept. Electron., INHA Univ., Incheon, South Korea
Abstract :
This paper describes a dual-mode DC-DC buck converter using a low power control method for mobile devices. Under a light load condition, the proposed converter within a PFM mode utilizes multiple steps of the state machine to control the load sensing circuit and enhances the efficiency of the PFM mode. The measurement results demonstrate the peak efficiency of 93% and 92.3% on PWM mode and PFM mode, respectively.
Keywords :
DC-DC power convertors; PWM power convertors; low-power electronics; power control; pulse frequency modulation; PFM mode; PWM mode; dual mode DC-DC buck converter; light load condition; load sensing circuit; low power control method; mobile devices; state machine; Buck converters; Circuits; DC-DC power converters; Delay effects; Power control; Pulse width modulation; Pulse width modulation converters; Signal generators; Threshold current; Voltage; DC-DC converter; PFM; PWM; soft-start;
Conference_Titel :
SoC Design Conference (ISOCC), 2009 International
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5034-3
Electronic_ISBN :
978-1-4244-5035-0
DOI :
10.1109/SOCDC.2009.5423865
