The TCR3UF12A from Toshiba is a LDO Voltage Regulator with Input Voltage 1.5 to 5.5 V, Output Voltage 0.8 to 5.0 V, Dropout Voltage 206 mV, Output Current 0.3 A, Quiescent Current 0.00034 mA. Tags: Surface Mount. More details for TCR3UF12A can be seen below.