PMP5317.1, Flyback (3.3V@8mA) Reference Design for Seismic

Reference design provides isolated 7V, +3.3V, and -3.3V outputs at 100mW total power from a 2.6Vdc to 5.1Vdc input. With total power loss below 40mW, the full load efficiency is over 70%. The minimum load losses are kept below 25mW. The TPS43000 is used to control this multiple-output flyback converter. The entire circuit fits onto a 1 square inch, single-sided circuit board