DESCRIPTION
The LT®1123 is a 3-pin bipolar device designed to be used in conjunction with a discrete PNP power transistor to form an inexpensive low dropout regulator. The LT1123 consists of a trimmed bandgap reference, error amplifier, and a driver circuit capable of sinking up to 125mA from the base of the external PNP pass transistor. The LT1123 is designed to provide a fixed output voltage of 5V.

FEATURES
■ Extremely Low Dropout
■ Low Cost
■ Fixed 5V Output, Trimmed to ±1%
■ 700µA Quiescent Current
■ 1mV Line Regulation
■ 5mV Load Regulation
■ Thermal Limit
■ 4A Output Current Guaranteed
■ Available in a 3-Pin TO-92 Package