The 171011801 from Wurth Elektronik is a DC to DC Converter with Input Voltage 4 to 18 V, Output Voltage 1 0.8 to 17 V, Output Current 1 1 A, Operating Temperature -40 to 125 Degree C, Storage Temperature -55 to 150 Degree C. Tags: Surface Mount, Buck/Step down. More details for 171011801 can be seen below.