A single-inductor eight-channel output DC-DC converter with time-limited power distribution control and single shared hysteresis comparator

Jungmoon Kim, Dong Seok Kim, Chulwoo Kim

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

This paper describes a time-limited power distribution control technique that can be used for single-inductor multiple-output (SIMO) DC-DC converter with many unbalanced loads. Furthermore, the tue all-comparator control technique that raises no stability or complexity issues is proposed. This all-comparator technique for SIMO converters is realized only with a single shared hysteresis comparator at a constant switching frequency of 800 kHz. This leads to the development of a new inductor peak-current control technique that does not require compensators and a phase-locked loop. This converter is analyzed and compared with existing SIMO converters with respect to the requirements of next-generation power management ICs. The maximum efficiency of the converter reaches 92%. The fabricated chip supporting eight-channel outputs is implemented in a 0.35-μm CMOS process and occupies an area of 2.4× 2.1 mm 2.

Original languageEnglish
Article number6605628
Pages (from-to)3354-3367
Number of pages14
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Volume60
Issue number12
DOIs
Publication statusPublished - 2013 Dec 1

    Fingerprint

Keywords

  • All-comparator control
  • comparator sharing technique
  • cross-regulation
  • hysteresis comparator
  • single-inductor multi-output (SIMO) DC-DC converter
  • time-limited power distribution control (TPDC)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this