Description
The SC4541 is a fully integrated, high voltage boost (stepup) and buck (step-down) LED driver. The input voltage range is 2.9V to 22V with output voltage up to 25V. The device is capable of driving up to 7 white LEDs. The high side sense enables a single-wire LED connection by taking advantage of the available system ground. This reduces connector cost and complexity.

Features
■ VIN Range — 2.9V to 22V
■ VOUT Range — Up to 25V
■ IOUT Range:
    ■ Up to 100mA (Boost)
    ■ Up to 200mA (Buck)
■ Drives Up to 7 Series WLEDs (Boost)
■ Drives Up to 5 Series WLEDs (Buck)
■ Integrated Schottky Rectifier
■ Single-Wire LED Connect
■ Current Mode Control
    ■ Frequency — 2.0MHz
    ■ No External Compensation
■ Direct PWM Dimming
    ■ 100:1 Range at 500Hz
■ Open-LED Protection — 27V
■ Low Shutdown Current < 1µA
■ Package Options:
    ■ Low Profile MLPD-UT, 6-pin 2x2 x0.6(mm)
    ■ SOT23, 6-pin 2.9x2.8 x1.45(mm)
■ Lead-free, Halogen-Free and WeEE/RoHS Compliant

Applications
■ Keypad Illumination
■ DSC and DSLR Display Backlight
■ Cellular Handsets
■ Automotive Lighting