The PKU5517VE from Flex Power Modules is a DC to DC Converter with Input Voltage 28 to 60 V, Output Voltage 1 5.5 to 6.5 V, Output Current 1 8.5 A, Output Power 50000 mW, Isolation Voltage 2250 Vdc. Tags: Surface Mount, Buck/Step down. More details for PKU5517VE can be seen below.