Description

The CAT37 is a DC/DC step up converter that delivers a regulated output current. Operation at a constant switching frequency of 1.2 MHz allows the device to be used with very small value external inductor and ceramic capacitors.

Features

• Low Quiescent Ground Current (0.5 mA Typical)

• Power Efficiency Over 80

• Compatible Pinout with LT1937

• Adjustable Output Current (up to 40 mA)

• High Frequency 1.2 MHz Operation

• Input Voltage Operation down to 2.5 V

• Low Resistance (0.5 ) Power Switch

• Drives up to 4 White LEDs in Series

• Shutdown Current Less than 1 μA

• Load Fault Protection Against Open−circuits

• Low Value External Components

• Low Profile (1 mm) TSOT−23 5−lead Package

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant

Applications

• Color LCD and Keypad Backlighting

• Cellular Phones

• Handheld Terminals

• Digital Cameras

• PDAs/Games

• Portable MP3 Players