Unsymmetrical parallel switched-capacitor (UP-SC) regulator with fast searching optimum ratio technique

Yen Ting Lin, Wen Hau Yang, Yu Sheng Ma, Yan Jiun Lai, Hung Wei Chen, Ke-Horng Chen, Chin Long Wey, Ying Hsi Lin, Jian Ru Lin, Tsung Yen Tsai

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Different from conventional multiphase switched-capacitor (SC) DC-DC converters, the proposed unsymmetrical parallel switched-capacitor (UP-SC) regulator provides more controllable input variables to increase available conversion ratios for improved load regulation. Even under higher conversion ratio numbers, the UP-SC regulator uses the fast searching optimum ratio (FSOR) technique to search the destined ratio rapidly and to reduce the transient recovery time. Experimental results show the test chip fabricated in 0.25μm CMOS process increases the ratio number to 187 and 2389 in 3-stage and 4-stage SC regulators, respectively. Transient recovery time reduces from 26μs to 1.5μs in case of 7mA load current step.

Original languageEnglish
Title of host publicationESSCIRC 2017 - 43rd IEEE European Solid State Circuits Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages287-290
Number of pages4
ISBN (Electronic)9781509050253
DOIs
StatePublished - 2 Nov 2017
Event43rd IEEE European Solid State Circuits Conference, ESSCIRC 2017 - Leuven, Belgium
Duration: 11 Sep 201714 Sep 2017

Publication series

NameESSCIRC 2017 - 43rd IEEE European Solid State Circuits Conference

Conference

Conference43rd IEEE European Solid State Circuits Conference, ESSCIRC 2017
CountryBelgium
CityLeuven
Period11/09/1714/09/17

Keywords

  • Fast searching optimum ratio (FSOR) technique
  • Unsymmetrical parallel switched-capacitor (UP-SC)
  • Wide voltage conversion ratio

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