The BD9151MUV from ROHM Semiconductor is a DC to DC Converter with Input Voltage 2.8 to 5.5 V, Output Voltage 1 1.8 V, Output Current 1 400 mA, Output Voltage 2 1.2 V, Output Current 2 800 mA. Tags: Surface Mount, Buck/Step down. More details for BD9151MUV can be seen below.