The BD9D300MUV from ROHM Semiconductor is a DC to DC Converter with Input Voltage 4 to 17 V, Output Voltage 1 0.9 to 5.25 V, Output Current 1 3000 mA, Operating Temperature -40 to 85 Degree C, Storage Temperature -55 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for BD9D300MUV can be seen below.