The VTX-224-053-0312 from Vigortronix is a DC to DC Converter with Input Voltage 3 to 3.6 V, Output Voltage 1 9 V, Output Current 1 11 to 111 mA, Output Power 500 mW, Isolation Voltage 3000 V. Tags: Surface Mount, Boost/Step Up. More details for VTX-224-053-0312 can be seen below.