Title :
Analysis of switched capacitor DC-DC step down converter
Author_Institution :
Dept. of Eng., Cambridge Univ., UK
Abstract :
A 5V/1V switched capacitor (SC) DC-DC converter designed for a 0.18 μm CMOS process is analyzed in detail, in this paper. Analytical equations are derived for the voltages and currents through the main components of the SC converter. The model includes switches, capacitors, equivalent series resistances and the load. The switches in the converter are represented by MOSFETs in the UMC 0.18 μm CMOS process. The impact of system parameters on output voltage ripple is studied using the analytical expressions.
Keywords :
DC-DC power convertors; MOSFET circuits; capacitors; equivalent circuits; integrated circuit modelling; mathematical analysis; semiconductor device models; switched capacitor networks; switches; 0.18 micron; 1 V; 5 V; CMOS process; DC-DC converter; MOSFET; SC converter; UMC; analytical equations; capacitors; equivalent series resistances; load model; step down converter; switched capacitor; switches; system parameters; voltage ripple; CMOS process; Capacitors; Circuits; DC-DC power converters; Equations; Semiconductor device modeling; Semiconductor devices; Switches; Switching converters; Voltage;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329938
