15a boostbuckinverting regulators mc34063a on semiconductor mc34063adg step up down inverting switching regulator adjustable output voltage 125v to 40v output voltage 1 output 15a output current 3v to 40v supply voltage 100khz switching frequency 0 to 70c 8 soic case the mc34063a series is a monolithic control circuit containing the primary functions required for dc to dc converters low standby current current limiting output voltage adjustable on semi mc34063adg switc