The MP28115 is an internally compensated 1.5MHz fixed frequency PWM synchronous step-down regulator. MP28115 operates from a 2.7V to 6V input and generates an adjustable output voltage from 0.8V to 0.9xVIN at up to 4A load current. The MP28115 integrates a 60m? high-side switch and a 60m? synchronous rectifier for high efficiency without an external Schottky diode. With peak current mode control and internal compensation, the MP28115 based solution achieves minimum footprint and component count. Fault condition protection includes Hiccup short-circuit protection, cycleby-cycle current limiting and thermal shutdown. Other features include frequency synchronization input, internal soft-start and power good output. The MP28115 is available in a small 3mm x 3mm 10-lead QFN package.4A Output Current Input Operation Range: 2.7V to 6V 1.5% Output Accuracy 60m? Internal Power MOSFET Switches All Ceramic Capacitor Design Up to 95% Efficiency 1.5MHz Fixed Switching Frequency Internal Soft-Start Frequency Synchronization Input Power Good Output Cycle-by-Cycle Current Limiting Hiccup Short Circuit Protection Thermal Shutdown 3mm x 3mm 10-lead QFN Package