A Hybrid Always-Dual-Path Recursive Step-Down Converter Using Adaptive Switching Level Control Achieving 95.4% Efficiency with 288mΩ Large-DCR Inductor

Woojoong Jung, Minsu Kim, Hyunjun Park, Sungmin Yoo, Tae Hwang Kong, Jun Hyeok Yang, Michael Choi, Jongshin Shin, Hyung Min Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Supply voltages of mobile systems have been gradually scaled down, requiring step-down converters with a low voltage conversion ratio (VCR) that can convert a Li-ion battery voltage of 2.8-4.2V to a lower supply voltage around 1V [1]-[4]. Also, the sizes of mobile device are getting smaller, limiting the volume of output components, especially inductors. Smaller-volume inductors suffer from larger DC resistance (DCR), increasing conduction power loss. To address these issues, hybrid topologies, which transfer load currents through both inductor and capacitor in parallel to reduce DCR losses, have been proposed [5], but more aggressive techniques to further improve efficiencies are required. The proposed converter not only reduces the inductor current, $I_{L}$, with an always-dual-path topology, but also minimizes $\Delta I_{L}$ using recursive switching level control that can reduce the switching voltage difference across the inductor in a build-up phase.

Original languageEnglish
Title of host publication2022 IEEE Custom Integrated Circuits Conference, CICC 2022 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665407564
DOIs
Publication statusPublished - 2022
Event43rd Annual IEEE Custom Integrated Circuits Conference, CICC 2022 - Newport Beach, United States
Duration: 2022 Apr 242022 Apr 27

Publication series

NameProceedings of the Custom Integrated Circuits Conference
Volume2022-April
ISSN (Print)0886-5930

Conference

Conference43rd Annual IEEE Custom Integrated Circuits Conference, CICC 2022
Country/TerritoryUnited States
CityNewport Beach
Period22/4/2422/4/27

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'A Hybrid Always-Dual-Path Recursive Step-Down Converter Using Adaptive Switching Level Control Achieving 95.4% Efficiency with 288mΩ Large-DCR Inductor'. Together they form a unique fingerprint.

Cite this