The TDN 5-0919WISM from Traco Power is a DC to DC Converter with Input Voltage 4.5 to 13.2 V, Output Voltage 1 9 V, Output Current 1 0.555 A, Output Power 5 W, Isolation Voltage 1.6 kV. Tags: Surface Mount, Buck-Boost. More details for TDN 5-0919WISM can be seen below.