The PKU3516ZS from Flex Power Modules is a DC to DC Converter with Input Voltage 9 to 36 V, Output Voltage 1 21.6 to 26.4 V, Output Current 1 2.1 A, Output Power 50000 mW, Isolation Voltage 2250 Vdc. Tags: Through Hole, Buck-Boost. More details for PKU3516ZS can be seen below.