描述 Description

The UTC?L1138B is a positive LDO voltage regulator using CMOS technology. It is featured as: low dropout voltage, high output voltage accuracy, and low current consumption. The internal circuits include a low on-resistance transistor to provide a low dropout voltage and large output current; an overcurrent protector to make sure the load current don’t exceed the current capacitance of the output transistor, a thermal shutdown circuit to escape device damage from over-heat, and an ON/OFF circuit to keep the battery life longer. In applications, the UTC L1138B can be used in power supply unit for DVD, CD-ROM drives, battery-powered devices, personal communication devices, and NBs.

特性 Features

? Output voltage‘s high accuracy:?±1.0%
? Low dropout voltage:?120mV typ. @3.0V output , IOUT=300mA
? Low current consumption:?80μA(Typ.)160μA max in operation
? ?0.1μA(Typ.)1.0μA max in shutdown mode
? High current capability:?800mA output @VIN
? ≥
? VOUT(S)+1.0V
? With ON/OFF circuit:?Ensures long battery life.
? Low ESR capacitor can be used: at least a 4.7μF ceramic capacitor for the output capacitor.
? High ripple rejection?70dB typ@1.0kHz
? With over current protector??
? With thermal shutdown circuit