Abstract

This paper presents a fast dynamic voltage scaling (DVS) buck converter without losing high efficiency. The proposed isosceles-triangular shunt current (ITSC) push-pull technique allows a turning-point for optimal DVS to be independent of passive components while supplying sufficient current of 35A/μs. Current-tailing handover (CTH) realizes no voltage droop after DVS even under resistive loads. ITSC and CTH can also enhance load-transient response. The chip fabricated in 180-nm CMOS achieves 7V/μs DVS-rate and 97.6% peak efficiency.

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