A Charge Pump Based Power Management Unit with 66%-Efficiency in 65 nm CMOS

Abdulqader Mahmoud, Mohammad Alhawari, Baker Mohammad, Hani Saleh, Mohammed Ismail

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

12 Scopus citations

Abstract

This paper presents a single stage power management unit that includes an enhanced stage-switch Dickson charge pump (DCP) to boost and regulate a low input voltage. A new switching mechanism is presented to significantly reduce the losses encountered in conventional DCP switches. Frequency and stage modulation are utilized in the proposed design. The stage modulation provides different gain levels (coarse) and the frequency modulation tunes the voltage level and regulates the output voltage based on a pre-determined reference voltage. Using four stages charge pump, silicon measurement results in 65 nm CMOS technology show a maximum efficiency of 66% at input voltage of 0.7 V and output power of 27 μW. The system supports a range of load current between 0.1 μA - 34 μA with a maximum operating frequency of 1.8MHz. The proposed system supports an input voltage range from 0.55 to 0.7 V which can be used in energy harvesting applications such as solar and thermal harvesting.

Original languageBritish English
Title of host publication2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538648810
DOIs
StatePublished - 26 Apr 2018
Event2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018 - Florence, Italy
Duration: 27 May 201830 May 2018

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2018-May
ISSN (Print)0271-4310

Conference

Conference2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018
Country/TerritoryItaly
CityFlorence
Period27/05/1830/05/18

Keywords

  • Dickson charge pump
  • frequency modulation
  • PMU energy harvesting
  • Solar cell
  • stage modulation
  • thermal harvesting

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