DESCRIPTION
The LTC®3201 is an ultralow noise, constant frequency, charge pump DC/DC converter specifically designed for powering white LEDs. The part produces a low noise boosted supply capable of supplying 100mA of output current. LED current is regulated for accurate and stable backlighting. A 3-bit DAC provides output current adjust for brightness control.

FEATURES
■ Input Noise Filter Minimizes Supply Noise
■ Constant Frequency Operation
■ 3-Bit LED Current Control
■ No Inductors
■ Low Shutdown Current: IIN < 1µA
■ Output Current: 100mA
■ VIN Range: 2.7V to 4.5V
■ 1.8MHz Switching Frequency
■ Soft-Start Limits Inrush Current at Turn-On
■ Short-Circuit and Overtemperature Protected
■ Available in 10-Pin MSOP Package

APPLICATIONS
■ White LED Backlighting
■ Programmable Boost Current Source