DESCRIPTION
The LTC®1872B is a constant frequency current mode step-up DC/DC controller providing excellent AC and DC load and line regulation. The device incorporates an accurate undervoltage lockout feature that shuts down the LTC1872B when the input voltage falls below 2.0V.

FEATURES
■ Burst ModeTM Operation Disabled for Lower Output Ripple at Light Loads
■ High Efficiency: Over 90%
■ High Output Currents Easily Achieved
■ Wide VIN Range: 2.5V to 9.8V
■ VOUT Limited Only by External Components
■ Constant Frequency 550kHz Operation
■ Current Mode Operation for Excellent Line and Load Transient Response
■ Shutdown Mode Draws Only 8µA Supply Current
■ Low Profile (1mm) ThinSOTTM Package

APPLICATIONS
■ Optical Communications
■ Lithium-Ion-Powered Applications
■ Cellular Telephones
■ Wireless Devices
■ Portable Computers
■ Scanners