A 94.9% Efficiency Always-Power-Delivered SIDO Buck Converter With Continuous Current Balancing and Complementary Adaptive-Switching Regulation

Woojoong Jung, Hyunjun Park, Minsu Kim, Hyung Min Lee

Research output: Contribution to journalArticlepeer-review

Abstract

This article proposes a single-inductor dual-output (SIDO) buck converter which always deliveries continuous power to outputs. The proposed converter has adopted complementary adaptive-switching regulation (CASR) with a continuous current balancing (CCB) mechanism and an auxiliary current path to passively bypass output switches in turn. The proposed converter and its control scheme can enhance output current continuities and power efficiencies while decreasing voltage ripples and fluctuations due to equivalent series resistance (ESR) and equivalent series inductance (ESL) at each output. The prototype converter was fabricated with the 180-nm CMOS process and comprises a 4.7-mu H inductor with 92-text{m}Omega DCR, two 10-mu text{F} output capacitors, and a 10-mu text{F} capacitor for the auxiliary current path. The measured results verified that the always-power-delivered (APD) SIDO converter can generate 1.8 and 3.3 V from 5 V with a combined type-3 compensator (CT-3C), while providing continuous current to each output. The peak efficiency was 94.9% with the load conditions of 150 mA for 3.3 V and 75 mA for 1.8 V. In addition, the overall efficiencies were measured higher than 90% in all operation ranges.

Original languageEnglish
Pages (from-to)1759-1770
Number of pages12
JournalIEEE Journal of Solid-State Circuits
Volume59
Issue number6
DOIs
Publication statusPublished - 2024 Jun 1

Bibliographical note

Publisher Copyright:
© 1966-2012 IEEE.

Keywords

  • Adaptive-switching regulation
  • always-power-delivery (APD)
  • auxiliary capacitor
  • auxiliary path
  • buck converter
  • continuous current balancing (CCB)
  • hybrid dual-path
  • single-inductor multi-output converter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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