The 36IB0503LS-1W from Ideal Power Ltd is a DC to DC Converter with Input Voltage 4.75 to 5.25 V, Output Voltage 1 3.3 V, Output Current 1 3 to 303 mA, Output Power 1000 mW, Isolation Voltage 1000 V. Tags: Through Hole, Buck/Step down. More details for 36IB0503LS-1W can be seen below.