The L5981 from STMicroelectronics is a DC to DC Converter with Input Voltage 2.9 to 18 V, Output Voltage 1 0.6 to 18 V, Output Current 1 1000 mA, Operating Temperature -40 to 150 Degree C, Storage Temperature -55 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for L5981 can be seen below.