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Two Farad, 5V SuperCap charger from a 3.3V input

Two Farad, 5V SuperCap charger from a 3.3V input

The LTC3459 controls peak inductor current when VIN is greater than or less than VOUT. This allows current to be controlled during start-up in a boost application or VOUT to be regulated below VIN when powered from a fresh battery. Peak current control makes the LTC3459 an ideal candidate for charging a back-up source such as a SuperCap.