A 97.6%-Efficient 1-2MHz Hysteretic Buck Converter with 7V/μs DVS-Rate Enabled by Isosceles-Triangular Shunt Current Push-Pull Technique

Hong-Hyun Bae,Jeong-Hyun Cho,Gyeong-Gu Kang,Yousung Park,Hyun-Sik Kim

2022 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits)（2022）

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摘要

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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关键词

hysteretic buck converter,isosceles-triangular shunt current push-pull technique,fast dynamic voltage scaling buck converter,ITSC,optimal DVS,current-tailing handover,voltage droop,CTH,load-transient response,CMOS,passive components,frequency 1.0 MHz to 2.0 MHz,efficiency 97.6 percent

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