DESCRIPTION

The SP6683 is a high power current regulated charge pump ideal for converting a Li-Ion battery input for driving up to 8 white LED’s used in backlighting color displays. The SP6683 operates with an internal 1.2MHz clock, enabling the use of small external components. Output current can be accurately regulated by modulating the switcher between the charge pump and output capacitor. In shutdown mode, the SP6683 discharges the output to ground and draws less than 1μA current. The SP6683 utilizes 1μF capacitors to deliver up to 200mA current regulated WLED drive capability. The SP6683 is offered in 10-pin DFN or MSOP package.

FEATURES

■ Drives up to 8 WLEDS

■ Low Profile Inductorless Regulator

■ 1x/1.5x Mode Charge Pump

■ 200mA Output Using 1μF Ceramic Caps

■ +2.7V to +5.5V Input Voltage Range

■ 0.9mA Quiescent Current

■ 1μA Shutdown Current

■ Built-in 1.2MHz Oscillator

■ Programmable Output Current or Voltage

■ PWM Dimming Control via Enable Pin

■ Shutdown to Disconnect Output from Input via Shutdown

■ Soft Start to limit In-Rush Current

■ Space Saving 10-pin 3 x 3mm DFN Package

APPLICATIONS

■ Mobile Phone

■ PDA

■ Digital Still Camera

■ Digital Camcorder

■ Palmtop Computer

■ Color LCD Module