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LTC3128 - 3A Monolithic Buck-Boost Supercapacitor Charger/Balancer

General Description

n ±2% Accurate Average Input Current Limit Programmable Up to 3A n Programmable Maximum Capacitor Voltage Limit n Active Charge Balancing for Fast Charging of Unmatched Capacitors n Charges Single or Stacked Capacitors n VIN Range: 1.73V to 5.5V n VOUT Range: 1.8V to 5.5V n

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LTC3128 3A Monolithic Buck-Boost Supercapacitor Charger and Balancer with Accurate Input Current Limit FEATURES DESCRIPTION n ±2% Accurate Average Input Current Limit Programmable Up to 3A n Programmable Maximum Capacitor Voltage Limit n Active Charge Balancing for Fast Charging of Unmatched Capacitors n Charges Single or Stacked Capacitors n VIN Range: 1.73V to 5.5V n VOUT Range: 1.8V to 5.5V n <2µA Quiescent Current from VOUT When Charged n Output Disconnect in Shutdown: <1µA IQ Shutdown n Power-Good Comparator n Power Failure Indicator n Thermally Enhanced 20-Lead (4mm × 5mm × 0.