Step Up/Down Inverting Switching Regulator
Cost: $1.95 each
Description: DC to DC converter/regulator MC34063A. Has an input range of 3V to 40V, output switch current of up to 1.5 amp. Step up, step down and invert capability. This is the unit we used in the high voltage ringer circuit for the port-o-rotary phone!
Documents: MC34063 Datasheet