The MICROCHIP TECH. MIC2289 is a PWM boost-switching regulator designed specifically for constant current white LED driver applications. This regulator incorporates an internal Schottky diode and offers three levels of output overvoltage protection, resulting in a small footprint and efficient DC/DC conversion. Its 95mV feedback voltage minimizes power dissipation and allows for lower output voltages, reducing battery current draw. The MIC2289's constant frequency 1.2 MHz PWM control scheme reduces noise and input ripple. It's suitable for applications like white LED backlighting in cell phones, digital cameras, and LED flashlights, as well as constant current power supplies.