The TMR 3-0521HI from Traco Power is a DC to DC Converter with Input Voltage 4.5 to 9 V, Output Voltage 1 5 V, Output Current 1 0.3 A, Output Power 3 W, Output Voltage 2 -5 V. Tags: Through Hole, Buck-Boost. More details for TMR 3-0521HI can be seen below.