DESCRIPTION
The LTC®1697 is designed to control a single 1W cold cathode fluorescent lamp (CCFL). An internal PWM dimming system maximizes efficiency and dimming range. Accurate lamp currents can be set with a single external resistor.

FEATURES
■ Operates from Single Li-Ion Battery
■ 2.8V to 5.5V Input Voltage Range
■ Very Low Shutdown Current: <2µA
■ Synchronous Buck Architecture for High Efficiency
■ PWM Dimming Frequency Adjustable with a Single Capacitor
■ Accurate Lamp Current Maximizes Lamp Lifetime
■ Fixed Frequency Operation at 300kHz
■ Internal or External PWM Dimming
■ Small 10-Pin MSOP Package

APPLICATIONS
■ PDAs
■ Handheld Computers
■ Portable Instruments
■ Handheld GPS with Map Display
■ Handheld TV/Video Monitor