The SKY81279 is a high-efficiency, 1.5A high-current boost converter with a programmable constant current sink. It is an ideal power solution for LED photo flash applications in all single-cell Li-ion powered products. The SKY81279 maintains output current regulation by switching the internal high-side and low-side switch transistors. The transistor switches are pulse-width modulated at a fixed frequency of 2.0MHz. The high switching frequency allows the use of a small external inductor and output capacitor. Skyworks' proprietary AS 2 Cwire™ (Advanced Simple Serial Control) serial digital interface is used to enable, disable, configure, and program the operation of the SKY81279. Using the AS2Cwire interface, the LED flash and movie-mode currents can be programmed to different levels. The SKY81279 includes a separate Flash Enable input to initiate the flash operation and a Flash Inhibit pin to quickly reduce the flash current to moviemode levels during high battery demand. The SKY81279 contains a thermal management system to protect the device in the event of output short circuit. Built-in circuitry prevents excessive inrush current during start-up. The shutdown feature reduces quiescent current to less than 1.0μA. The SKY81279 is available in a a Pb-free, 14-pin 2mm x 3mm TDFN package.