An efficient thermal energy harvesting and power management for μwatt wearable BioChips

Mohammad Alhawari, Dima Kilani, Baker Mohammad, Hani Saleh, Mohammed Ismail

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

22 Scopus citations

Abstract

This paper presents an efficient thermal energy harvesting IC (EHIC) that supports a battery-less μWatt system-on-chips. The EHIC consists of an inductor-based DC-DC converter that boosts a low input voltage to a suitable output voltage level. Further, a switched capacitor buck converter is utilized to regulate the boost converter output voltage and to support multiple output voltage levels, namely 0.6V, 0.8V and 1V. In low energy mode and to enhance the efficiency, the EHIC is capable of bypassing the switched capacitor so that the load is driven directly from the boost converter. The prototype chip is fabricated in 65nm CMOS and occupies an area of less than 0.46mm2. Measured results confirm an efficiency of 65% at 0.6V output voltage and 42μW. In addition, the end-to-end peak efficiency is 71% at 0.8V output voltage and 182μW.

Original languageBritish English
Title of host publicationISCAS 2016 - IEEE International Symposium on Circuits and Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2258-2261
Number of pages4
ISBN (Electronic)9781479953400
DOIs
StatePublished - 29 Jul 2016
Event2016 IEEE International Symposium on Circuits and Systems, ISCAS 2016 - Montreal, Canada
Duration: 22 May 201625 May 2016

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2016-July
ISSN (Print)0271-4310

Conference

Conference2016 IEEE International Symposium on Circuits and Systems, ISCAS 2016
Country/TerritoryCanada
CityMontreal
Period22/05/1625/05/16

Keywords

  • boost converter
  • dynamic voltage scaling
  • Energy harvesting
  • Internet-of-Things
  • power management unit
  • switched-capacitor

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