The TCR2LN31 from Toshiba is a LDO Voltage Regulator with Input Voltage 1.5 to 5.5 V, Output Voltage 0.8 to 3.6 V, Dropout Voltage 200 mV, Output Current 0.2 A, Quiescent Current 0.001 mA. Tags: Surface Mount. More details for TCR2LN31 can be seen below.