The RHFL6000A from STMicroelectronics is a LDO Voltage Regulator with Input Voltage 2.5 to 12 V, Output Voltage 12.3 V, Dropout Voltage 250 to 900 mV, Output Current 2 A, Quiescent Current 0.2 to 80 mA. Tags: Surface Mount. More details for RHFL6000A can be seen below.