DESCRIPTION
The LT ®1963A series are low dropout regulators optimized for fast transient response. The devices are capable of supplying 1.5A of output current with a dropout voltage of 340mV. Operating quiescent current is 1mA, dropping to <1µA in shutdown. Quiescent current is well controlled; it does not rise in dropout as it does with many other regulators. In addition to fast transient response, the LT1963A regulators have very low output noise which makes them ideal for sensitive RF supply applications.

FEATURES
■ Optimized for Fast Transient Response
■ Output Current: 1.5A
■ Dropout Voltage: 340mV
■ Low Noise: 40µVRMS (10Hz to 100kHz)
■ 1mA Quiescent Current
■ No Protection Diodes Needed
■ Controlled Quiescent Current in Dropout
■ Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
■ Adjustable Output from 1.21V to 20V
■ <1µA Quiescent Current in Shutdown
■ Stable with 10µF Output Capacitor*
■ Stable with Ceramic Capacitors*
■ Reverse Battery Protection
■ No Reverse Current
■ Thermal Limiting
■ 5-Lead TO-220, DD, 3-Lead SOT-223 and 8-Lead SO Packages

APPLICATIONS
■ 3.3V to 2.5V Logic Power Supplies
■ Post Regulator for Switching Supplies