A Fully Integrated Dual-Output Continuously Scalable-Conversion-Ratio SC Converter for Battery-Powered IoT Applications

Taehyeong Park, Hyunjin Kim, Mingi Jeong, Inho Park, Chulwoo Kim

Research output: Contribution to journalArticlepeer-review

Abstract

This paper proposes a fully integrated dual-output continuously scalable-conversion-ratio (CSCR) switched-capacitor (SC) converter that increases the overall power conversion efficiency (PCE) beyond that of the conventional dual-output SC converters. The structure employs proposed dual-output CSCR SC stage and channel SC stage to transfer charges to two output load voltages (<inline-formula> <tex-math notation="LaTeX">$V_{\mathrm{OUT}}$</tex-math> </inline-formula>s) with high PCE. Also, the converter is controlled by analog switching frequency modulation (ASFM) and digital flying capacitance modulation (DFCM) loops to regulate both <inline-formula> <tex-math notation="LaTeX">$V_{\mathrm{OUT}}$</tex-math> </inline-formula>s simultaneously. The proposed converter is fabricated using a 180 nm CMOS process, and regulates <inline-formula> <tex-math notation="LaTeX">$V_{\mathrm{OUT}}$</tex-math> </inline-formula> of 1.1&#x2013;1.6 V and 0.55&#x2013;0.95 V with an input voltage of 1.5&#x2013;1.9 V. In measurement, the proposed converter achieves a maximum PCE of 85%, and an average PCE of 78.6% for the available <inline-formula> <tex-math notation="LaTeX">$V_{\mathrm{OUT}}$</tex-math> </inline-formula> ranges. Moreover, the converter exhibits the maximum <inline-formula> <tex-math notation="LaTeX">$I_{\mathrm{OUT}}$</tex-math> </inline-formula>s of 21 mA and 4 mA, respectively.

Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
DOIs
Publication statusAccepted/In press - 2024

Bibliographical note

Publisher Copyright:
IEEE

Keywords

  • Capacitors
  • Computer architecture
  • Continuously scalable-conversion-ratio
  • dc–dc converter
  • dual-output switched capacitor converter
  • Hardware
  • Internet of Things
  • Internet of Things (IoT)
  • system on chip (SoC) design
  • Topology
  • Video recording
  • Voltage control

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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