The TME 0503S from Traco Power is a DC to DC Converter with Input Voltage 4.5 to 5.5 V, Output Voltage 1 3.3 V, Output Current 1 0.26 A, Output Power 1 W, Isolation Voltage 1 kV. Tags: Through Hole, Buck/Step down. More details for TME 0503S can be seen below.