The L4978 from STMicroelectronics is a DC to DC Converter with Input Voltage 8 to 55 V, Output Voltage 1 3.3 to 50 V, Output Current 1 2000 mA, Operating Temperature -40 to 150 Degree C, Storage Temperature -40 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for L4978 can be seen below.