DESCRIPTION
The LT®1932 is a fixed frequency step-up DC/DC converter designed to operate as a constant-current source. Because it directly regulates output current, the LT1932 is ideal for driving light emitting diodes (LEDs) whose light intensity is proportional to the current passing through them, not the voltage across their terminals.

FEATURES
■ Up to 80% Efficiency
■ Inherently Matched LED Current
■ Adjustable Control of LED Current
■ Drives Five White LEDs from 2V
■ Drives Six White LEDs from 2.7V
■ Drives Eight White LEDs from 3V
■ Disconnects LEDs In Shutdown
■ 1.2MHz Fixed Frequency Switching
■ Uses Tiny Ceramic Capacitors
■ Uses Tiny 1mm-Tall Inductors
■ Regulates Current Even When VIN > VOUT
■ Operates with VIN as Low as 1V
■ Low Profile (1mm) ThinSOT™ Package

APPLICATIONS
■ Cellular Telephones
■ Handheld Computers
■ Digital Cameras
■ Portable MP3 Players
■ Pagers