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can a voltage regulator deliver an output higher than its input?

can a voltage regulator deliver an output higher than its input? for instance if i had a 12v power supply would a 15v voltage regulator be able to output 15v? i am thinking of making a variable power supply and wanted to know if a 12 DC adaptor would be enough for larger voltages

aelias363 years ago
Yup. They're call step-up regulators.
No, a standard linear regulator can't generate more than its input !

A SWITCHING regulator can boost the voltage though.

Steve