DC1220B

DC1220B demonstration circuit is a low profile regulated dual cell SuperCAP charger featuring the LTC3225. The LTC3225 is a constant-current SuperCAP charger designed to charge two SuperCAPs in series to a fixed output voltage of 4.8V/5.3V from a 2.9V to 5.5V input supply. Automatic cell balancing is achieved during the charging phase. Low input noise, low quiescent current and low external parts count make the LTC3225 ideally suited for small, battery-powered applications. Charging current level is programmed through an external resistor. Internal current limit and thermal shutdown circuitry allows the part to survive a continuous short-circuit from PROG to GND. When the input supply is removed, the LTC3225 automatically enters a low current state, drawing less than 1μA from the SuperCAPs. The LTC3225 is offered in a 10-lead (3mm × 2mm) DFN package.

附註

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