Title :
High efficiency, inductorless step-down DC/DC converter
Author :
Bin, Shao ; Yujia, Yang ; Ying, Wang ; Zhiliang, Hong
Author_Institution :
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai
Abstract :
A high efficiency, inductorless step-down DC/DC converter is proposed. High efficiency is achieved through the combination of the fractional conversion ratio charge pump and load current sensing circuit. The circuits have been designed in the TSMC 0.25mum 2.5V/5V mixed signal CMOS process. The DC/DC converter has an output voltage of 1.8V (load current les 200mA) with the accuracy of plusmn 1% and the ripple voltage less than plusmn10mV for the input battery voltage from 2.8V to 5V. The peak and average efficiency is over 85% and 65%, respectively
Keywords :
CMOS integrated circuits; DC-DC power convertors; 0.25 micron; 1.8 V; 2.5 V; 2.8 to 5.0 V; TSMC mixed signal CMOS process; charge pump circuit; fractional conversion ratio; inductorless step-down DC-DC converter; input battery voltage; load current sensing circuit; ripple voltage; Batteries; Capacitors; Charge pumps; Circuit noise; DC-DC power converters; Pulse width modulation; Space vector pulse width modulation; Switched-mode power supply; Switches; Voltage control;
Conference_Titel :
ASIC, 2005. ASICON 2005. 6th International Conference On
Conference_Location :
Shanghai
Print_ISBN :
0-7803-9210-8
DOI :
10.1109/ICASIC.2005.1611326
