Triple Binary SAR Control in Distributive Digital Low Dropout Regulators for 3.6ns Fast Transient Response and 0.4mV Low Output Voltage Ripple

Bo Kuan Wu, Tzu Ying Wu, Sheng Cheng Lee, Ke Horng Chen, Ying Hsi Lin, Shian Ru Lin, Tsung Yen Tsai

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

Abstract

the proposed distributive digital low dropout (DLDO) regulator utilizes the triple binary successive approximation recursive (SAR) control algorithm for fast transient response. In addition, the body voltage control (BVC) can be used to expand the least significant bit (LSB) to enhance the accuracy. In case of load transients, the BVC can further increase or decrease the driving capability for fast transient response. Experimental results show that the voltage droop can be less than 72 mV at F-{\text{CLK}}=100 \text{MHz}, accomplishing a fast settling time of 3.6 ns. Burst cells and lossless cells can maintain overshoot below 68 mV with the settling time of 11.2 ns. The BVC technique reduces output voltage ripple to less than 0.4 mV in the steady-state.

Original languageEnglish
Title of host publicationIEEE International Symposium on Circuits and Systems, ISCAS 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2919-2922
Number of pages4
ISBN (Electronic)9781665484855
DOIs
StatePublished - 2022
Event2022 IEEE International Symposium on Circuits and Systems, ISCAS 2022 - Austin, United States
Duration: 27 May 20221 Jun 2022

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2022-May
ISSN (Print)0271-4310

Conference

Conference2022 IEEE International Symposium on Circuits and Systems, ISCAS 2022
Country/TerritoryUnited States
CityAustin
Period27/05/221/06/22

Keywords

  • body voltage control (BVC)
  • digital low dropout (DLDO)
  • least significant bit (LSB)
  • triple binary successive approximation recursive (SAR)

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