
1) Electric power conversion
Found on
https://www.crosswordclues.com/clue/charge-pump

A charge pump is a kind of DC to DC converter that uses capacitors as energy storage elements to create either a higher or lower voltage power source. Charge pump circuits are capable of high efficiencies, sometimes as high as 90–95% while being electrically simple circuits. Charge pumps use some form of switching device(s) to control the connec...
Found on
http://en.wikipedia.org/wiki/Charge_pump

A power supply which uses capacitors instead of inductors to store and transfer energy to the output. A voltage doubler or tripler.
Found on
http://www.mpoweruk.com/glossary.htm
No exact match found.