Texas InstrumentsLM2588T-3.3/NOPBDC to DC Converter and Switching Regulator Chip
Conv DC-DC 4V to 40V Synchronous Step Up Single-Out 3.3V 5A 7-Pin(7+Tab) TO-220 Tube
Conv DC-DC 4V to 40V Synchronous Step Up Single-Out 3.3V 5A 7-Pin(7+Tab) TO-220 Tube