3A, ULTRA-LOW DROPOUT VOLTAGE REGULATOR

DESCRIPTION

The UTC LR1831 is a high performance positive voltage

regulator designed for use in applications requiring very low input

voltage and very low dropout voltage at up to 3A. It operates with

a VIN as low as 1V and VDD voltage 3V with programmable output

voltage as low as 0.8V. The UTC LR1831 features ultra low

dropout, ideal for applications where VOUT is very close to VIN.

Additionally, it has an enable pin to further reduce power

dissipation while shutdown. The UTC LR1831 provides excellent

regulation over variations in line, load and temperature. The UTC

LR1831 provides a power good signal to indicate if the voltage

level of VO reaches 92% of its rating value.

FEATURES

* Dropout Voltage 260mV @ 3A Typically

* Output Current up to 3A

* High Accuracy Voltage

* VOUT Power Good Signal

* VOUT Pull Low Resistance when Disable

* Thermal Shutdown Protection

* Current Limiting Protection