LTC3625EDE#TRPBF

The LTC3625EDE#TRPBF from LT is a programmable supercapacitor charger IC designed to efficiently charge two supercapacitors in series. It operates from a 2.7V to 5.5V input supply and provides selectable output voltages, such as 4.8V/5.3V or 4V/4.5V. A key feature is its automatic cell balancing, which prevents overvoltage damage to individual capacitors and maximizes the charge rate without requiring external balancing resistors.

This charger supports programmable charging currents up to 500mA with a single inductor or 1A with a dual inductor configuration. It boasts high efficiency, high charging current, and a low quiescent current of 23µA in no-load conditions. In shutdown mode, the device draws less than 1µA from the supercapacitors, making it ideal for backup power systems. The LTC3625EDE#TRPBF is housed in a compact 12-lead, 3mm x 4mm x 0.75mm DFN package, suitable for small form factor applications.

Applications for this supercapacitor charger include servers, RAID systems, mass storage, high current backup supplies, solid-state hard drives, wireless power meters, and high peak power boosted supplies. Its design minimizes external component count, requiring only one inductor, one bypass capacitor at VIN, and one programming resistor.