A 93% efficiency reconfigurable switched-capacitor DC-DC converter using on-chip ferroelectric capacitors
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Author(s)
El-Damak, Dina Reda
Bandyopadhyay, Saurav
Chandrakasan, Anantha P.
Date Issued
February 2013
Journal
2013 IEEE International Solid-State Circuits Conference Digest of Technical Papers
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
El-Damak, D., S. Bandyopadhyay, and A. P. Chandrakasan. “A 93% Efficiency Reconfigurable Switched-Capacitor DC-DC Converter Using on-Chip Ferroelectric Capacitors.” 2013 IEEE International Solid-State Circuits Conference Digest of Technical Papers (February 17-21, 2013), San Francisco, CA.
Version
Author's final manuscript
Abstract
Dynamic Voltage Scaling (DVS) has become one of the standard techniques for energy efficient operation of systems by powering circuit blocks at the minimum voltage that meets the desired performance [1]. Switched Capacitor (SC) DC-DC converters have gained significant interest as a promising candidate for an integrated energy conversion solution that eliminates the need for inductors [2,3]. However, SC converters efficiency is limited by the conduction loss, bottom plate parasitic capacitance, gate drive loss in addition to the overhead of the control circuit. Reconfigurable SC converters supporting multi-gain settings have been proposed to allow efficient operation across wide output range [2,4]. Also, High density deep trench capacitors with low bottom plate parasitic capacitance have been utilized in [5] achieving a peak efficiency of 90%. In this work, we exploit on-chip ferroelectric capacitors (Fe-Caps) for charge transfer owing to their high density and extremely low bottom plate parasitic capacitance [6]. High efficiency conversion is achieved by combining the Fe-Caps with multi-gain setting converter in a reconfigurable architecture with dynamic gain selection.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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DOI of Published Version
https://doi.org/10.1109/ISSCC.2013.6487776
