High-Efficiency Step-Down Multi-Mode Switching DC-DC Converter for IoT Devices

Hsiang Ming Yen, Chia Ling Wei, Chi Shi Chen, Terng Yin Hsu

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

Abstract

A step-down multi-mode switching DC-DC converter for battery-powered portable IoT products is proposed, and it was implemented by using a 0.35-μm CMOS mixed-signal 2P4M polycide 5V/3.3V process. The load capacitor at converter output can be removed from the dynamic circuit which helps during transients. The output stage is designed with both the static and dynamic controls to suppress the possible large overshoot/undershoot voltage during load change. Moreover, a novel adaptive switching frequency (ASF) technique is also proposed in this work to optimize the converter performance at different input voltages. There are three operational modes in the proposed regulator, and, thus, a wide input voltage range, 2.1-5 V, is achieved. The output voltage is set to 1.8 V, and the maximal load current is 100mA. The measured conversion efficiency may go up to 87.6%.

Original languageEnglish
Title of host publicationProceedings - 32nd IEEE International System on Chip Conference, SOCC 2019
EditorsDanella Zhao, Arindam Basu, Magdy Bayoumi, Gwee Bah Hwee, Ge Tong, Ramalingam Sridhar
PublisherIEEE Computer Society
Pages449-454
Number of pages6
ISBN (Electronic)9781728134826
DOIs
StatePublished - Sep 2019
Event32nd IEEE International System on Chip Conference, SOCC 2019 - Singapore, Singapore
Duration: 3 Sep 20196 Sep 2019

Publication series

NameInternational System on Chip Conference
Volume2019-September
ISSN (Print)2164-1676
ISSN (Electronic)2164-1706

Conference

Conference32nd IEEE International System on Chip Conference, SOCC 2019
CountrySingapore
CitySingapore
Period3/09/196/09/19

Keywords

  • DC-DC converter
  • step-down
  • switched capacitor (SC)

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