A 95mV-startup step-up converter with VTH-tuned oscillator by fixed-charge programming and capacitor pass-on scheme

Po-Hung Chen*, Koichi Ishida, Katsuyuki Ikeuchi, Xin Zhang, Kentaro Honda, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, Takayasu Sakurai

*Corresponding author for this work

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

50 Scopus citations

Abstract

Harvesting energy from the environment by using a thermoelectric generator (TEG) or photovoltaic cells provides a solution for battery-free sensor networks or electronic healthcare systems. In these systems, the harvested energy is supplied at a very low voltages, requiring a low-startup-voltage power circuit for kick-start from low voltage. A previous sub-100mV-startup-voltage boost converter [1] was implemented by using a mechanically assisted step-up process that needs vibration at startup and the application is rather limited. In this paper, a 95mV startup voltage step-up converter without any mechanical stimulus extends the applicability of energy harvesting. The circuit converts a 100mV input to a 0.9V output with 72% conversion efficiency without any external clocks or mechanical switches. A capacitor pass-on scheme eliminates an additional external output capacitor that functions only at the startup.

Original languageEnglish
Title of host publication2011 IEEE International Solid-State Circuits Conference - Digest of Technical Papers, ISSCC 2011
Pages216-217
Number of pages2
DOIs
StatePublished - 12 May 2011
Event2011 IEEE International Solid-State Circuits Conference, ISSCC 2011 - San Francisco, CA, United States
Duration: 20 Feb 201124 Feb 2011

Publication series

NameDigest of Technical Papers - IEEE International Solid-State Circuits Conference
ISSN (Print)0193-6530

Conference

Conference2011 IEEE International Solid-State Circuits Conference, ISSCC 2011
CountryUnited States
CitySan Francisco, CA
Period20/02/1124/02/11

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