The MPQ2454 is a frequency-programmable (350kHz to 2.3MHz) step-down switching regulator with an integrated internal high-side, high-voltage power MOSFET. It outputs efficiently up to 0.6A and has current-mode control for fast loop response. The wide 3.3V to 36V input range accommodates a variety of step-down applications in automotiveinput environments. A 3.5µA shutdown-mode quiescent current allows for use in batterypowered applications. Also, the device has a high duty cycle and low drop-out mode for automotive cold-crank conditions. The MPQ2454 achieves high-power conversion efficiency over a wide load range by scaling down the switching frequency at light-load conditions to reduce both switching and gate driving losses. Frequency foldback prevents inductor current runaway during start-up and short circuit. Thermal shutdown provides reliable, fault-tolerant operation. An open-drain power good (PG) signal indicates when the output is within its nominal voltage. The MPQ2454 is available in MSOP-10 EP and QFN-10 (3mmx3mm) packages.60µA Operating Quiescent Current Wide 3.3V to 36V Operating Input Range 200mO Internal Power MOSFET Up to 2.3MHz Programmable Switching Frequency Stable with Ceramic Output Capacitors Internal Compensation External Soft-Start > 90% Efficiency Low Dropout Operation for Cold-Crank 3.5µA Low Shutdown Supply Current Synchronization to External Clock Power Good Output Programmable Power Good Delay Time MSOP-10 EP and QFN-10 (3mmx3mm) Packages Available in AEC-Q100 Grade 1