A power management system based on adaptive low-dropout voltage regulator with optimal reference pre-compensation technique

Inho Park, Jinseok Oh, Chulwoo Kim

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

    1 Citation (Scopus)

    Abstract

    This paper presents an adaptive dropout voltage regulator based on a constant on-time buck converter that improves the light load efficiency. By regulating the gate voltage of the pass transistor of the low dropout regulator (LDO), the dropout voltage is automatically minimized depending on the load current, increasing the end-to-end power conversion efficiency at the light load condition by 11.3%. The proposed direct-charging scheme and simple undershoot detector reduce the droop and improve the efficiency of the LDO. The reference pre-compensation technique is proposed to improve the ripple performance by compensating the reference voltage based on the on-time pulses. The proposed voltage regulator was fabricated by a 0.18-μm CMOS process and occupies 0.2874 mm2

    Original languageEnglish
    Title of host publication2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781728192017
    DOIs
    Publication statusPublished - 2021
    Event53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Daegu, Korea, Republic of
    Duration: 2021 May 222021 May 28

    Publication series

    NameProceedings - IEEE International Symposium on Circuits and Systems
    Volume2021-May
    ISSN (Print)0271-4310

    Conference

    Conference53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021
    Country/TerritoryKorea, Republic of
    CityDaegu
    Period21/5/2221/5/28

    Bibliographical note

    Publisher Copyright:
    © 2021 IEEE

    Keywords

    • Buck converter
    • Constant-on-time
    • DC-DC converter
    • Dropout voltage optimization
    • LDO
    • Low-dropout regulator
    • Power management IC

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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