Regulation Control Design Techniques for Integrated Switched Capacitor Voltage Regulators

Usama Awais, Jae Sun Seo

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

Abstract

This paper presents and comprehensively compares various regulation control design techniques targeted to improve output voltage ripple, droop against load transients, and power efficiency of a 2:1 switched-capacitor voltage regulator (SCVR). Three unique SCVR schemes are designed in 40nm CMOS that provide enhanced tradeoffs over the baseline design. First, we present the divided reference slice scheme, which achieves the least droop (27.95 mV) and quickest recovery of 600 ps across a 10X load step. Second, the switch width modulation scheme is proposed to help in power reduction proportional to the load current. Third, a header-footer based current-mode control design scheme is presented which achieves up to 2X reduction in output voltage ripple compared to the baseline scheme. A peak efficiency of 87.6% is achieved at a load current of 44 mA.

Original languageEnglish (US)
Title of host publication2020 IEEE 63rd International Midwest Symposium on Circuits and Systems, MWSCAS 2020 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages186-189
Number of pages4
ISBN (Electronic)9781538629161
DOIs
StatePublished - Aug 2020
Event63rd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2020 - Springfield, United States
Duration: Aug 9 2020Aug 12 2020

Publication series

NameMidwest Symposium on Circuits and Systems
Volume2020-August
ISSN (Print)1548-3746

Conference

Conference63rd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2020
Country/TerritoryUnited States
CitySpringfield
Period8/9/208/12/20

Keywords

  • Integrated power management
  • current mode control
  • switched capacitor voltage converter
  • voltage ripple

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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