The BD3506F from ROHM Semiconductor is a LDO Voltage Regulator with Input Voltage 5.5 to 4.3 V, Output Voltage 0.65 to 2.5 V, Dropout Voltage 120 to 200 mV, Output Current 2.5 A, Quiescent Current 0.7 mA. Tags: Surface Mount. More details for BD3506F can be seen below.