DESCRIPTION
The LTC®3209-1/LTC3209-2 are highly integrated multidisplay LED controllers. These parts contain a high efficiency, low noise charge pump to provide power to MAIN, CAM and AUX LED displays. The LTC3209-1/LTC3209-2 require only four small ceramic capacitors and one current set resistor to form a complete LED power supply and current controller.

FEATURES
■ Multimode Charge Pump Provides Up to 94%
   Efficiency (1x, 1.5x, 2x)
■ Up to 600mA Total Output Current
■ LTC3209-1: 8 Current Sources Available as
   6 × 25mA MAIN, 1 × 400mA CAM and 1 × 15mA AUX
■ LTC3209-2: 8 Current Sources Available as
   5 × 25mA MAIN, 2 × 200mA CAM and 1 × 15mA AUX
■ LED On/Off and Brightness Level Programmable
   Using 2-Wire I2CTM Interface
■ Automatic Charge Pump Mode Switching or Fixed
   Mode for Power Supply Generation
■ Low Noise Constant Frequency Operation*
■ Internal Soft-Start Limits Inrush Current During
   Start-up and Mode Switching
■ Short Circuit/Thermal/Open-Shorted LED Protection
■ 256 Brightness States for MAIN Display
■ 16 Brightness States for CAM Display
■ 4 Brightness States for AUX Display
■ 20-Lead (4mm × 4mm) QFN Package

APPLICATIONS
■ Video/Camera Phones with QVGA+ Displays