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LT3741 20A Super Capacitor Charger with 5V Regulated Output from 10V to 36V Input

Mar 9th 2010

20A Super Capacitor Charger with 5V Regulated Output from 10V to 36V Input

The LT3741 is a fixed frequency synchronous step-down DC/DC controller designed to accurately regulate the output current at up to 20A. The average current-mode controller will maintain inductor current regulation over a wide output voltage range of 0V to (VIN – 2V). The regulated current is set by an analog voltage on the CTRL pins and an external sense resistor. Due to its unique topology, the LT3741 is capable of sourcing and sinking current. The regulated voltage and overvoltage protection are set with a voltage divider from the output to the FB pin. The switching frequency is programmable from 200kHz to 1MHz through an external resistor or through an external clock signal.