Design and verification of an integrated current mode switching regulator

Author

Huang, Chun-Sheng ; Tsai, Chien-Hung ; Wang, Jia-Hui

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

fYear

2011

fDate

25-28 April 2011

Firstpage

1

Lastpage

4

Abstract

In this paper, a design of current-mode control switching regulator was presented with loop gain analysis. The analysis was verified by the chip implementation and measurement. A current mirror based current sensor was used to sensing the inductor current information. This chip has been fabricated with a TSMC 2P4M 0.35μm polyside CMOS process. The measurement result verify the buck converter with on-chip current sensing can operate with load current from 200mA-500mA in a supply voltage from 2.7-4.2V and the output voltage of 1.8V with no sub-harmonic condition occur. By the loop gain measurement, the correctness of the loop gain analysis is verified. The stability of proposed buck converter was guaranteed by the loop gain measurement, too.

Keywords

CMOS integrated circuits; DC-DC power convertors; current-mode circuits; switching convertors; CMOS process; DC-DC buck converter; TSMC; current 200 mA to 500 mA; current mirror; inductor current information; integrated current mode control switching regulator; loop gain analysis; on-chip current sensor; size 0.35 mum; voltage 1.8 V; voltage 2.7 V to 4.2 V; Current measurement; Gain measurement; Inductors; Semiconductor device measurement; Sensors; Switches; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Design, Automation and Test (VLSI-DAT), 2011 International Symposium on

Conference_Location

Hsinchu

ISSN

Pending

Print_ISBN

978-1-4244-8500-0

Type

conf

DOI

10.1109/VDAT.2011.5783548

Filename

5783548