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http://dx.doi.org/10.6109/jkiice.2016.20.9.1755

A Small Areal Dual-Output Switched Capacitor DC-DC Converter with a Improved Range of Input Voltage  

Hwang, Seon-Kwang (School of Electrical Engineering and Computer Science, Chungbuk National University)
Kim, Seong-Yong (Silliconworks)
Woo, Ki-Chan (School of Electrical Engineering and Computer Science, Chungbuk National University)
Kim, Tae-Woo (School of Electrical Engineering and Computer Science, Chungbuk National University)
Yang, Byung-Do (Department of Electronics Engineering, Chungbuk National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.20, no.9, 2016 , pp. 1755-1762 More about this Journal
Abstract
In this paper, a small areal dual-output SC(switched capacitor) DC-DC converter with a improved range of an input voltage is presented. The conventional SC DC-DC converter has an advantage of low cost and small chip area. But, it has a narrow input voltage range to convert efficiently. Also, it has a lager chip area and a lower power efficiency from multiple outputs. The proposed SC DC-DC converter improves the power efficiency by using the capacitor array structure which efficiently converts the voltage according to the input voltage. By sharing two switch array, it reduces the number of switches and capacitors from 32 to 25. The proposed SC DC-DC converter was manufactured in a $0.18{\mu}m$ CMOS process. In the simulation, the range of the input voltage is 0.7~ 1.8V, the max. power efficiency is 90%, and the chip area is $0.255mm^2$.
Keywords
DC-DC Converter; Switched Capacitor; Dual-Output; Switch Array;
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