A current sensing circuit using current-voltage conversion for PMOS-based LDO regulators

Author

Ho Quang Tay ; Vo Tuan Nam ; Nguyen Hoang Duc ; Bui Ngoc Chau

Author_Institution

IC Design Res. & Educ. Center (ICDREC), Vietnam Nat. Univ.-Hochiminh City, Ho Chi Minh City, Vietnam

fYear

2012

Firstpage

1

Lastpage

4

Abstract

In this paper, a standalone output current sensing module for CMOS low dropout linear voltage (LDO) regulator with PMOS as pass device is proposed. The main purpose of current sensing is to create an over-current protection or to limit the output current value in certain applications. Based on I-V conversion in which the supply voltage varies from 2.7 V-4.2 V, the current clamp value varies from 178 mA to 270 mA in the case of 200 mA load limiting. The proposal has been successfully fabricated using a CMOS technology, and verified through the correct operation of a power management prototype chip.

Keywords

CMOS integrated circuits; electric sensing devices; voltage regulators; CMOS LDO regulator; CMOS low dropout linear voltage regulator; I-V conversion; PMOS-based LDO regulators; current 178 mA to 270 mA; current sensing circuit; current-voltage conversion; power management prototype chip; standalone output current sensing module; voltage 2.7 V to 4.2 V; Clamps; Regulators; Sensors; Threshold current; Threshold voltage; Transistors; Voltage control; LDO; current limiter; current sensing; current-voltage conversion; over-current protection;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Applications and Industrial Electronics (ISCAIE), 2012 IEEE Symposium on

Conference_Location

Kota Kinabalu

Print_ISBN

978-1-4673-3032-9

Type

conf

DOI

10.1109/ISCAIE.2012.6482056

Filename

6482056