The LTC
The LTC3128 is a highly efficient, buck-boost DC/DC supercapacitor charger designed to operate efficiently from input voltages above, below, or equal to the output voltage. It incorporates accurate programmable average input current limits, active charge balancing, and programmable maximum capacitor voltage protection, making it ideal for safely charging and protecting large capacitors in backup power systems.
The device is available in low-profile, thermally enhanced 20-Lead QFN and 24-Lead TSSOP packages. Key features include a programmable input current range of 0.5A to 3A, a programmable maximum capacitor voltage from 1.8V to 3.0V, and low quiescent current operation. It supports applications such as memory backup, server power, and industrial systems.
| Maximum Capacitor Voltage | 1.8V to 3.0V |
|---|---|
| Average Input Current Range | 0.5A to 3A |
| Quiescent Current (Sleep Mode) | <2µA |
The LTC3128 is a highly efficient, buck-boost DC/DC supercapacitor charger that operates efficiently from input voltages above, below, or equal to the output voltage.
The LTC3128 is offered in a 20-Lead 4mm × 5mm × 0.75mm QFN package and a 24-Lead TSSOP package.
The input current limit is programmed using a single resistor (RPROG) to set the average input current.