3.5-0.5V input, 1.0V output multi-mode power transformer for a supercapacitor power source with a peak efficiency of 70.4%

Xingyi Hua, Ramesh Harjani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

A multi-mode 3.5-0.5V input, 1.0V output power transformer based on switched-capacitor DC-DC converters is designed to extract 98% of the energy from a 80mF supercapac-itor, to power a periodically active RFID tag. Six converter modes (3 step-up and 3 step-down) are automatically selected depending on the input voltage. The system usage time is maximized by charging the supercapacitor to 3.5V while device breakdown is avoided via novel circuit techniques. The circuit fabricated in TSMC's 65nm GP process occupies an area of 0.48mm2, supports a 3.3μA load current and operates at 2.0MHz. The gradually decreasing 3.5V to 0.5V supercapacitor voltage is transformed to a steady 1V output with a peak efficiency of 70.4%.

Original languageEnglish (US)
Title of host publication2015 IEEE Custom Integrated Circuits Conference, CICC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479986828
DOIs
StatePublished - Nov 25 2015
EventIEEE Custom Integrated Circuits Conference, CICC 2015 - San Jose, United States
Duration: Sep 28 2015Sep 30 2015

Publication series

NameProceedings of the Custom Integrated Circuits Conference
Volume2015-November
ISSN (Print)0886-5930

Other

OtherIEEE Custom Integrated Circuits Conference, CICC 2015
CountryUnited States
CitySan Jose
Period9/28/159/30/15

    Fingerprint

Cite this

Hua, X., & Harjani, R. (2015). 3.5-0.5V input, 1.0V output multi-mode power transformer for a supercapacitor power source with a peak efficiency of 70.4%. In 2015 IEEE Custom Integrated Circuits Conference, CICC 2015 [7338390] (Proceedings of the Custom Integrated Circuits Conference; Vol. 2015-November). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CICC.2015.7338390