DESCRIPTION
The LT1432 is a control chip designed to operate with the LT1170/LT1270 family of switching regulators to make a very high efficiency 5V step-down (buck) switching regulator. A minimum of external components is needed.

FEATURES
■ Accurate Preset +5V Output
■ Up to 90% Efficiency
■ Optional Burst Mode for Light Loads
■ Can be Used with Many LTC Switching ICs
■ Accurate Ultra-Low-Loss Current Limit
■ Operates with Inputs from 6V to 30V
■ Shutdown Mode Draws Only 15mA
■ Uses Small 50mH Inductor

APPLICATIONS
■ Laptop and Palmtop Computers
■ Portable Data-Gathering Instruments
■ DC Bus Distribution Systems
■ Battery-Powered Digital Widgets