Title :
Low power consumption and high power density integrated DC-DC converter for portable equipments
Author :
Sugahara, S. ; Yamada, K. ; Edo, M. ; Sato, T. ; Yamasawa, K.
Author_Institution :
Fuji Electr. Device Technol. Co. Ltd., Matsumoto
Abstract :
We developed an integrated buck type DC-DC converter for portable electronic equipments. A newly developed pulse frequency modulation (PFM) control integrate circuits (1 Cs), which includes output power MOSFETs, achieved a low quiescent current below 14 muA and small chip size of 1.4 times 1.1 mm2 in 0.35 mum CMOS process. The integrated converter consisted of the PFM control 1Cs on a planar inductor and had a maximum efficiency of 90 % and a power density above 100 W/cm3.
Keywords :
DC-DC power convertors; MOSFET circuits; pulse frequency modulation; MOSFET; low power consumption; portable equipments; power density integrated DC-DC converter; pulse frequency modulation; size 0.35 micron; CMOS process; DC-DC power converters; Electronic equipment; Energy consumption; Frequency modulation; MOSFETs; Power generation; Pulse circuits; Pulse modulation; Size control;
Conference_Titel :
Solid-State Circuits Conference, 2008. A-SSCC '08. IEEE Asian
Conference_Location :
Fukuoka
Print_ISBN :
978-1-4244-2604-1
Electronic_ISBN :
978-1-4244-2605-8
DOI :
10.1109/ASSCC.2008.4708750
