Merged Two-Stage Power Converter With Soft Charging Switched-Capacitor Stage in 180 nm CMOS

Author(s)
Pilawa-Podgurski, Robert C. N.; Perreault, David J.
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Abstract
In this paper, we introduce a merged two-stage dc-dc power converter for low-voltage power delivery. By separating the transformation and regulation function of a dc-dc power converter into two stages, both large voltage transformation and high switching frequency can be achieved. We show how the switched-capacitor stage can operate under soft charging conditions by suitable control and integration (merging) of the two stages. This mode of operation enables improved efficiency and/or power density in the switched-capacitor stage. A 5-to-1 V, 0.8 W integrated dc-dc converter has been developed in 180 nm CMOS. The converter achieves a peak efficiency of 81%, with a regulation stage switching frequency of 10 MHz.
Date issued
2012-05
URI
http://hdl.handle.net/1721.1/87099
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Journal
IEEE Journal of Solid-State Circuits
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Pilawa-Podgurski, Robert C. N., and David J. Perreault. “Merged Two-Stage Power Converter With Soft Charging Switched-Capacitor Stage in 180 Nm CMOS.” IEEE Journal of Solid-State Circuits 47, no. 7 (n.d.): 1557–1567.
Version: Author's final manuscript
ISSN
0018-9200
1558-173X
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