SP6682

® SP6682 High Efficiency Charge Pump Regulator for White LEDs FEATURES ■ Ideal For White LED Driver ■ Low Profile, Inductorless Regulator ■ X1.5 and X2 Modes for Highest Efficiency ■ +2.7V to +5.5V Input Voltage Range ■ Fast Turn-On Time, 175µS ■ 1mA Quiescent Current ■ <1.5µA Shutdown Current ■ Built-in 600kHz Oscillator ■ Programmable Output Current or Voltage ■ PWM Dimming Control with Enable Pin ■ Shutdown to Disconnect Output from Input ■ Soft Start to Eliminate In-Rush Current ■ Industry Standard 10-pin MSOP Package and Small 10-pin DFN Package VOUT C1P VIN VMODE FB 1 2 3 4 5 10 C2P SP6682 10 Pin DFN 9 C1N 8 GND 7 C2N 6 EN/PWM Now Available in Lead Free Packaging APPLICATIONS ■ Next Generation Mobile Phones ■ PDAs ■ 3.3V to 5.0V Conversion ■ Digital Still Cameras ■ Digital Camcorders ■ Palmtop Computers ■ Color LCD Modules DESCRIPTION The SP6682 is a current regulated charge pump ideal for converting a Li-Ion battery input for driving white LED used in backlighting color displays. The charge pump automatically switches between X1.5 and X2 modes based on the input voltage, providing improved efficiency over traditional methods using charge pump doubler followed by LDO. This input voltage threshold can be externally programmed for optimized efficiency at specific output voltages and currents. The SP6682 operates with an internal 600kHz clock, enabling the use of small external components. Output current or voltage can be accurately regulated by modulating the swi...