Title :
Design Strategy for Step-Up Charge Pumps With Variable Integer Conversion Ratios
Author :
Su, Feng ; Ki, Wing-Hung
Author_Institution :
Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol.
fDate :
5/1/2007 12:00:00 AM
Abstract :
Method in identifying all possible configurations of 2-phase charge pumps giving an integer conversion ratio with a fixed number of flying capacitors is presented. A systematic strategy is proposed to design an integrated charge pump as an example with a variable gain of 6times and 7times in a standard 0.35-mum CMOS process using only 4 flying capacitors. Conduction loss is considered and minimized. Measurement results verified the validity of the design methodology
Keywords :
DC-DC power convertors; switched capacitor networks; 0.35 micron; CMOS process; flying capacitors; gate control; step-up charge pumps; switched-capacitor dc-dc converter; variable integer conversion ratios; Batteries; CMOS process; Capacitors; Charge pumps; Circuits; Gain; Switches; Switching converters; Topology; Voltage; Charge pump; gate control; switched-capacitor dc–dc converter;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2006.890405
