DESCRIPTION
The LT®1129/LT1129-3.3/LT1129-5 are micropower low dropout regulators with shutdown. The devices are capable of supplying 700mA of output current with a dropout voltage of 0.4V at maximum output. Designed for use in battery-powered systems the low quiescent current, 50µA operating and 16µA in shutdown, make them an ideal choice. The quiescent current does not rise in dropout as it does with many other low dropout PNP regulators.

FEATURES
■ 0.4V Dropout Voltage
■ 700mA Output Current
■ 50µA Quiescent Current
■ No Protection Diodes Needed
■ Adjustable Output from 3.8V to 30V
■ 3.3V and 5V Fixed Output Voltages
■ Controlled Quiescent Current in Dropout
■ Shutdown
■ 16µA Quiescent Current in Shutdown
■ Stable with 3.3µF Output Capacitor
■ Reverse Battery Protection
■ No Reverse Output Current
■ Thermal Limiting
■ Surface Mount SOT-223 and DD Packages

APPLICATIONS
■ Low Current Regulator
■ Regulator for Battery-Powered Systems
■ Post Regulator for Switching Supplies
■ 5V to 3.3V Logic Regulator