Description
The SC4509 is a highly integrated step-up DC/DC converter targeted for white LED backlighting applications. It is designed to drive up to five LEDs with a wide input voltage range of 2.7 to 10 volts. Designed for 20V output voltage, the SC4509 operates with a constant 1.2MHz PWM frequency.

FEATUREs
VINrange: 2.7V — 10V
Integrated Schottky diode
81% efficiency
Requires only 4 external components
Up to 20V of output voltage
30mA maximum LED current
Open LED protection (OVP)
1.2MHz PWM switching frequency
Low feedback voltage (20OmV typical)
Wide range of PWM dimming
Drives up to 5 LEDs
500mA switch current limit
220nF output capacitor
Available in 2mm x 2mm x 0.75mm MLPD-W8 and SOT23-6 packages
Packages are fully WEEE and RoHS compliant

APPLICATIONs
Digital Video Cameras
White LED Backlight Driver
OLED Display Driver
Portable Media Players
GPS Receivers
Cellular Phones
PDAs and Handheld Computers