Title :
High-efficiency synchronous dual-output switched-capacitor dc-dc converter with digital state machine control
Author :
Han Shiming ; Wu Xiaobo ; Liu Yang
Author_Institution :
Inst. of VLSI Design, Zhejiang Univ., Hangzhou, China
Abstract :
An integrated high-efficiency dual-output switched-capacitor (SC) DC-DC converter was presented. The converter is capable of synchronously providing a buck output voltage channel and a boost channel with shared three fly capacitors and a switch-array. Fully digital state machine controller and gain-hopping regulation technique endued the converter with high power efficiency, fast transient response and system steadiness. The converter was designed and simulated in TSMC 0.35 μm CMOS process, and Spectre simulation showed that the converter can generate steady output voltages of 5 V and 1.8 V with maximum efficiency up to 90%, and result in 10% higher efficiency than conventional fixed gain regulation.
Keywords :
CMOS integrated circuits; DC-DC power convertors; switched capacitor networks; CMOS process; DC-DC converter; Spectre simulation; boost channel; buck output voltage channel; digital state machine control; gain-hopping regulation technique; size 0.35 micron; synchronous dual-output switched-capacitor; transient response; Analog-digital conversion; Charge pumps; Circuits; DC-DC power converters; Digital control; Machine control; Regulators; Switching converters; Very large scale integration; Voltage; dual-output; gain-hopping; multiple gain pair conversion; state machine; switched-capacitor DC-DC converter;
Conference_Titel :
Low Power Electronics and Design (ISLPED), 2007 ACM/IEEE International Symposium on
Conference_Location :
Portland, OR
Electronic_ISBN :
978-1-59593-709-4
DOI :
10.1145/1283780.1283843
