A Power-Efficient 1-2-MHz Hysteretic Buck Converter With High DVS Rate Enabled by Isosceles-Triangular Shunt Current Push-Pull Technique

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This letter presents a dc–dc buck converter featuring rapid dynamic voltage scaling (DVS) speed without sacrificing efficiency. The proposed isosceles-triangular shunt current (ITSC) push–pull technique allows an arithmetically-simplified turning point voltage for optimal DVS to be independent of passive components while supplying a sufficient current of 35 A/ μs . Current-tailing handover (CTH), also presented in this letter, can realize no voltage droop after DVS even under resistive loads. Combining ITSC and CTH aids in enhancing load-transient response. The chip fabricated in a 180-nm CMOS operates at the slow switching frequency of 1–2 MHz, offering a peak efficiency of 97.6%. A high DVS rate of 7 V/ μs , enabled by the proposed ITSC, is measured.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2022-11
Language
English
Article Type
Article
Citation

IEEE SOLID-STATE CIRCUITS LETTERS, v.5, pp.280 - 283

ISSN
2573-9603
DOI
10.1109/lssc.2022.3225301
URI
http://hdl.handle.net/10203/302950
Appears in Collection
EE-Journal Papers(저널논문)
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