The MC34063EC from STMicroelectronics is a DC to DC Converter with Input Voltage 3 to 40 V, Output Voltage 1 1.25 to 38 V, Output Current 1 1500 mA, Operating Temperature 150 Degree C, Storage Temperature -40 to 150 Degree C. Tags: Surface Mount, Buck-Boost. More details for MC34063EC can be seen below.