The KFXX from STMicroelectronics is a LDO Voltage Regulator with Input Voltage 0.5 to 20 V, Output Voltage 2.5 to 8 V, Dropout Voltage 400 mV, Output Current 0.5 A, Quiescent Current 0.5 mA. Tags: Surface Mount. More details for KFXX can be seen below.