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Design Techniques for Fully Integrated Switched-Capacitor DC-DC Converters

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3 Author(s)
Hanh-Phuc Le ; University of California, Berkeley ; Seth R. Sanders ; Elad Alon

This paper describes design techniques to maximize the efficiency and power density of fully integrated switched-capacitor (SC) DC-DC converters. Circuit design methods are proposed to enable simplified gate drivers while supporting multiple topologies (and hence output voltages). These methods are verified by a proof-of-concept converter prototype implemented in 0.374 mm2 of a 32 nm SOI process. The 32-phase interleaved converter can be configured into three topologies to support output voltages of 0.5 V-1.2 V from a 2 V input supply, and achieves 79.76% efficiency at an output power density of 0.86 W/mm2 .

Published in:

IEEE Journal of Solid-State Circuits  (Volume:46 ,  Issue: 9 )