A Fully Integrated Self-Oscillating Switched-Capacitor DC-DC Converter for Near-Threshold Loads
: Matthew J. Turnquist, Markus Hiienkari Jani Mäkipää, Lauri Koskinen
: IEEE Asian Solid-State Circuits Conference (A-SSCC)
: 2015
: 2015 IEEE Asian Solid-State Circuits Conference (A-SSCC)
: 2015 IEEE ASIAN SOLID-STATE CIRCUITS CONFERENCE (A-SSCC)
: 137
: 140
: 4
: 978-1-4673-7192-6
: 978-1-4673-7191-9
DOI: https://doi.org/10.1109/ASSCC.2015.7387441
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 mm(2). 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 mu W (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.