The VTX-224-053-0510 from Vigortronix is a DC to DC Converter with Input Voltage 4.5 to 5.5 V, Output Voltage 1 3.3 V, Output Current 1 30 to 300 mA, Output Power 500 mW, Isolation Voltage 3000 V. Tags: Surface Mount, Buck/Step down. More details for VTX-224-053-0510 can be seen below.