A fully integrated self-oscillating switched-capacitor DC-DC converter for near-threshold loads

Matthew J. Turnquist, Markus Hiienkari, Jani Mäkipää, Lauri Koskinen

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

1 Citation (Scopus)


We introduce a fully integrated step-down self-oscillating switched-capacitor DC-DC converter that delivers near-threshold (NT) output voltages. The converter is built in 28 nm UTBB FD-SOI and occupies 0.0104 mm2. Back-gate biasing is utilized to increase the load power range. Measurements show a peak efficiency of 87%, self start-up capability, and a minimum efficiency of 75% for 79 nW to 200 μW (ideal) loads. Measurements with an off-chip NT processor load also show high efficiency. The converter's large load power range and high efficiency are a good fit for energy-constrained NT processors.
Original languageEnglish
Title of host publicationSolid-State Circuits Conference (A-SSCC), 2015 IEEE Asian
PublisherIEEE Institute of Electrical and Electronic Engineers
ISBN (Electronic)978-1-4673-7191-9
ISBN (Print)978-1-4673-7192-6
Publication statusPublished - 21 Jan 2015
MoE publication typeA4 Article in a conference publication
EventIEEE Asian Solid-State Circuits Conference - Fujian, China
Duration: 9 Nov 201511 Nov 2015


ConferenceIEEE Asian Solid-State Circuits Conference
Abbreviated titleA-SSCC


  • capacitors
  • electric inverters
  • reconfigurable hardware
  • back-gate biasing
  • energy-constrained
  • fully integrated
  • high-efficiency
  • output voltages
  • processor loads
  • self-oscillating


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