The MRF28D from Pico Electronics is a DC to DC Converter with Input Voltage 8 to 24 V, Output Voltage 1 28 V, Output Current 1 0.04 A, Output Power 1000 mW, Operating Temperature -55 to 85 Degree C. Tags: Through Hole, Boost/Step Up. More details for MRF28D can be seen below.