The VTX-224-051-0323 from Vigortronix is a DC to DC Converter with Input Voltage 3 to 3.6 V, Output Voltage 1 12 V, Output Current 1 4.2 to 42 mA, Output Power 500 mW, Output Voltage 2 -12 V. Tags: Surface Mount, Buck-Boost. More details for VTX-224-051-0323 can be seen below.