DESCRIPTION
The LTC®3205 is a highly integrated multidisplay LED controller. The part contains a high efficiency, low noise fractional step-up/step-down charge pump to provide power for both main and sub white LED displays plus an RGB color LED display. The LTC3205 requires only four small ceramic capacitors plus two resistors to form a complete 3-display LED power supply and current controller.

FEATURES
■ Step-Up/Step-Down Fractional Charge Pump for Up to 92% Efficiency
■ Independent Current and Dimming Control for 1-4 LED Main, 1-2 LED Sub and RGB LED Displays
■ LED Currents Programmable Using 3-Wire Serial Interface
■ Up to 250mA of Continuous LED Current
■ 0.7% LED Current Matching
■ Low Noise Constant Frequency Operation*
■ Minimal Component Count
■ Automatic Soft-Start Limits Inrush Current
■ Four Programmable Dimming States for Main and Sub Displays
■ Up to 4096 Color Combinations for RGB Display
■ Low Shutdown Current: ICC < 1µA
■ Tiny 24-Lead (4mm × 4mm) QFN Package

APPLICATIONS
■ Cellular Phones
■ Wireless PDAs
■ Multidisplay Handheld Devices