LT1121

Micropower Low Dropout Regulators with Shutdown

DESCRIPTION

The LT®1121/-3.3/LT1121-5 are micropower low dropout regulators with shutdown. These devices are capable of supplying 150mA of output current with a dropout

voltage of 0.4V. Designed for use in battery-powered systems, the low quiescent current, 30µA operating and 16µA in shutdown, makes them an ideal choice. The quiescent

current is well-controlled; it does not rise in dropout as it does with many other low dropout PNP regulators.

FEATURES

0.4V Dropout Voltage

150mA Output Current

30µA Quiescent Current

No Protection Diodes Needed

Adjustable Output from 3.75V to 30V

3.3V and 5V Fixed Output Voltages

Controlled Quiescent Current in Dropout

Shutdown

16µA Quiescent Current in Shutdown

Stable with 0.33µF Output Capacitor

Reverse Battery Protection

No Reverse Current with Input Low

Thermal Limiting

Available in the 8-Lead SO, 8-Lead PDIP, 3-Lead SOT-23 and 3-Lead TO-92 Packages

APPLICATIONS

Low Current Regulator

Regulator for Battery-Powered Systems

Post Regulator for Switching Supplies