A Single-Inductor Dual-Output DC-DC Converter with Dual-Mode Control

Yun Hsuan Hsu, Dao Han Yao, Po Hung Chen

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

Abstract

This paper demonstrates a single-inductor dual-output (SIDO) buck converter, which is developed for implantable medical devices. The dual-mode operation, which combines pulse-skip modulation (PSM) and pulse-width modulation (PWM), is employed to regulate outputs under light load and heavy load conditions, respectively. The converter provides two output voltages: VOUT1 (2.5-3V) for charge pumps and VOUT2 (2V) for digital circuits. With the start-up circuits, the SIDO buck converter can act as self-start-up DC-DC buck converter. To avoid voltage stress issue under 3.2-4.2V battery operation in 180nm standard (CMOS) process, the stacked power stage is used. The proposed level shifter includes an additional level restorer to avoid a misjudgment issue during start-up period. The simulation results demonstrate that the converter achieves peak efficiency of 94.5% with PSM control, and it achieves peak efficiency of 89.1% with PWM control.

Original languageEnglish
Title of host publication2nd International Conference on Electrical, Communication and Computer Engineering, ICECCE 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728171166
DOIs
StatePublished - Jun 2020
Event2nd International Conference on Electrical, Communication and Computer Engineering, ICECCE 2020 - Istanbul, Turkey
Duration: 12 Jun 202013 Jun 2020

Publication series

Name2nd International Conference on Electrical, Communication and Computer Engineering, ICECCE 2020

Conference

Conference2nd International Conference on Electrical, Communication and Computer Engineering, ICECCE 2020
CountryTurkey
CityIstanbul
Period12/06/2013/06/20

Keywords

  • adaptive on-time
  • buck converter
  • low-dropout regulator (LDO)
  • pulse-skip modulation (PSM)
  • pulse-width modulation (PWM)

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