The TAR5S31U from Toshiba is a LDO Voltage Regulator with Input Voltage 2.4 to 15 V, Output Voltage 1.5 to 5.0 V, Dropout Voltage 130 mV, Output Current 0.2 A, Quiescent Current 0.17 mA. Tags: Surface Mount. More details for TAR5S31U can be seen below.