App note: Integrated supercapacitor charger

Application circuit of supercapacitor ENYCAP(TM) power management from Vishay. Link here (PDF)

The MAL219699001E3 demonstration circuit is a fully transparent power management solution with a regulated 2 W output and integrated power backup. It provides a DC/DC regulator with a wide power input range from 4.0 V to 20 V and adjustable regulated output between 3.3 V and 5.0 V.

from Dangerous Prototypes https://ift.tt/2Lfe86L