| Description & Applications | FEATURES • High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications • VIN Range: 2.7V to 5.5V • Fully Programmable Current with Single Wire — 16-Step Logarithmic Scale — 14/18/27mA Max Current — Four Low-Current Settings Down to 115µA — Low IQ (50µA) for Single-Channel, LowCurrent Mode • Tri-Mode 1X, 1.5X, 2X Charge Pump for Maximum Efficiency and VF Coverage • Drives Up to Five LEDs • Individual Main-Sub (4-1) Group Control • No Inductors, Low Noise Operation • 1MHz Constant Switching Frequency • Small Application Circuit • Built-In Thermal Protection • Built-In Auto-Disable for Open Circuit • Automatic Soft Start • IQ <1µA in Shutdown • STDFN33-14 or QFN44-16 Package Applications • Color (RGB) Lighting • Programmable Current Sink • Transmissive LCD Display • White LED Backlighting • White Photo Flash for Digital Still Cameras |