A Dual-Comparator based Low-Cost Low-Ripple Buck DC-DC Converter

Fan He, Xinyuan Han, Yuyang Ding, Ling Fu, Ye Sun, Bo Zhou*

*Corresponding author for this work

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

Abstract

A dual-comparator based low-cost low-ripple buck DC-DC converter is designed in 65-nm CMOS, with a quiescent current of 38 μ A. By using digital switches and a multiplexing comparator, the error comparator and peak-voltage comparator are combined into a single module with low complexity. The input voltage of 3.3 V is converted to an output voltage of 1.5 V, with the peak efficiency of 94% and load regulation of 0.15%, under the load current changes from 1 mA to 50 mA. The circuit is simple and only includes logic control, power driver, power stage, multiplexing module and zero-voltage comparator. The proposed converter has a maximum output ripple of 5.7 mV under pm 10% supply variations, -40-90 °C temperature range and different process corners.

Original languageEnglish
Title of host publication2023 5th International Conference on Circuits and Systems, ICCS 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages248-252
Number of pages5
ISBN (Electronic)9798350308273
DOIs
Publication statusPublished - 2023
Event5th International Conference on Circuits and Systems, ICCS 2023 - Huzhou, China
Duration: 27 Oct 202330 Oct 2023

Publication series

Name2023 5th International Conference on Circuits and Systems, ICCS 2023

Conference

Conference5th International Conference on Circuits and Systems, ICCS 2023
Country/TerritoryChina
CityHuzhou
Period27/10/2330/10/23

Keywords

  • DC-DC converter
  • buck
  • dual-comparator
  • low cost
  • low quiescent current
  • low ripple

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