DESCRIPTION
The LTC®3210 is a low noise charge pump DC/DC converter designed to drive four MAIN LEDs and one high current CAM LED for camera lighting. The LTC3210 requires only four small ceramic capacitors and two current set resistors to form a complete LED power supply and current controller.

FEATURES
■ Low Noise Charge Pump Provides High Effi ciency
   with Automatic Mode Switching
■ Multimode Operation: 1x, 1.5x, 2x
■ Individual Full-Scale Current Set Resistors
■ Up to 500mA Total Output Current
■ Single Wire EN/Brightness Control for MAIN and
   CAM LEDs (8 Brightness Steps)
■ 64:1 Brightness Control Range for MAIN Display
■ Four 25mA Low Dropout MAIN LED Outputs
■ One 400mA Low Dropout CAM LED Output
■ Low Noise Constant Frequency Operation*
■ Low Shutdown Current: 3µA
■ Internal Soft-Start Limits Inrush Current During
   Startup and Mode Switching
■ Open/Short LED Protection
■ No Inductors
■ 3mm × 3mm 16-Lead Plastic QFN Package

APPLICATIONS
■ Multi-LED Light Supply for Cellphones/DSCs/PDAs