The MP4350 is a high frequency step-down switching regulator with an integrated internal high-side high voltage power MOSFET. It provides 2.5A output with current mode control for fast loop response and easy compensation. The wide 4.5V to 20V input range accommodates a variety of step-down applications, including those in an automotive input environment. A 100µA operational quiescent current allows use in battery-powered applications. High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency at light load condition to reduce the switching and gate driving losses. The frequency foldback helps prevent inductor current runaway during startup and thermal shutdown provides reliable, fault tolerant operation. By switching at 4MHz, the MP4350 is able to prevent switching related EMI (Electromagnetic Interference) noise problems, such as those found in AM radio and ADSL applications. The MP4350 is available in a small 3mm x 3mm 10-pin QFN package.100µA Quiescent Current Wide 4.5V to 20V Operating Input Range 150m? Internal Power MOSFET Up to 4MHz Programmable Switching Frequency Ceramic Capacitor Stable Internal Soft-Start Internal Set Current Limit without a Current Sensing Resistor Up to 95% Efficiency Output Adjustable from 0.8V to 16V Available in a 10-Pin QFN (3mm x 3mm) Package