The MP2454 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 automotive-input environments. A 3.5? shutdown mode quiescent current allows for use in battery-powered applications. Also, the device has a high duty cycle and low drop-out mode for automotive cold-crank conditions. The MP2454 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 MP2454 is available in MSOP-10 EP and QFN-10 (3mm x 3mm) packages.