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An auto-selectable-frequency pulse-width modulator for buck converters with improved light-load efficiency

Authors Man, T.Y. HKUST affiliated (currently or previously)
Mok, P.K.T. View this author's profile
Chan, Man Sun View this author's profile
Issue Date 2008
Source Digest of Technical Papers - IEEE International Solid-State Circuits Conference , v. 51, 2008
Summary This modulator improves buck converter light-load efficiency by changing the switching frequency among a set of pre-defined frequencies. The frequencies are chosen so that the output spectrum of the converter with this modulator is the same as it would be if pulse-width modulation were used. This design is fabricated in a 0.35μm CMOS process, uses 1.4mm2 and provides 90% peak efficiency at 300mA and 70% efficiency at 10mA. ©2008 IEEE.
ISSN 0193-6530
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Language English
Format Conference paper
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