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

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 c...

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Bibliographic Details
Published in2012 IEEE Symposium on Computer Applications and Industrial Electronics pp. 1 - 4
Main Authors Ho Quang Tay, Vo Tuan Nam, Nguyen Hoang Duc, Bui Ngoc Chau
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2012
Subjects
Clamps
current limiter
current sensing
current-voltage conversion
LDO
over-current protection
Regulators
Sensors
Threshold current
Threshold voltage
Transistors
Voltage control
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ISBN1467330329
9781467330329
DOI10.1109/ISCAIE.2012.6482056

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Summary: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.
ISBN:1467330329
9781467330329
DOI:10.1109/ISCAIE.2012.6482056