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

Volume

1

fYear

2005

fDate

24-0 Oct. 2005

Firstpage

395

Lastpage

398

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;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2005. ASICON 2005. 6th International Conference On

Conference_Location

Shanghai

Print_ISBN

0-7803-9210-8

Type

conf

DOI

10.1109/ICASIC.2005.1611326

Filename

1611326