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Fully Integrated Switched-Capacitor DC/DC Converter  

Authors
 Shunkov V.E.
 Kus O.N.
 Prokopyev V.Y.
 Butuzov V.A.
 Bocharov Y.I.
 Shunkov V.E.
Date of publication
 2016

Abstract
 Fully integrated switched capacitor DC/DC converter was designed in a 180 nm 5 metal bulk CMOS technology. Converter is able to supply modern CMOS ICs with currents up to 300 mA from 5V an 3.3V bus voltages, as well as from Li-based battery source voltages.
The designed converter utilizes multi-topology conversion cell consisting of two capacitors and nine switches and is able to maintain high efficiency in a broad range of input and output voltages. Control circuits consist of a feedforward loop for topology selection and a fully-digital feedback loop providing pulse-frequency modulation and switching capacitance modulation to keep high efficiency in a broad range of output currents.
Test chip containing downscaled converter and main building blocks as standalone tests was designed, fabricated and tested, proving efficiency of the design and creating the good base for further development and mass production of the converter.
Keywords
 integrated circuit, DC/DC converter, switched capacitors, CMOS.
Library reference
 Shunkov V.E., Kus O.N., Prokopyev V.Y., Butuzov V.A., Bocharov Y.I., Shunkov V.E. Fully Integrated Switched-Capacitor DC/DC Converter // Problems of Perspective Micro- and Nanoelectronic Systems Development - 2016. Proceedings / edited by A. Stempkovsky, Moscow, IPPM RAS, 2016. Part 3. P. 93-99.
URL of paper
 http://www.mes-conference.ru/data/year2016/pdf/D112.pdf

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