DESCRIPTION
The LT®1432-3.3 is a control chip designed to operate with the LT1171/LT1271 family of switching regulators to make a very high efficiency 3.3V step-down (buck) switching regulator. A minimum of external components is needed.

FEATURES
■ Accurate Preset 3.3V Output
■ Up to 87% Efficiency
■ Optional Burst ModeTM Operation for Light Loads
■ Can Be Used with Many LTC Switching ICs
■ Accurate Ultra-Low-Loss Current Limit
■ Operates with Inputs from 4.5V to 30V
■ Shutdown Mode Draws Only 15mA
■ Uses Small 30mH Inductor

APPLICATIONS
■ Laptop and Palmtop Computers
■ Portable Data-Gathering Instruments