The LTC3110HUF#TRPBF is a 2A bidirectional buck-boost DC/DC regulator with capacitor charger and balancer. Its wide 0.1V to 5.5V capacitor/battery voltage and 1.8V to 5.25V system backup voltage ranges make it well suited to a wide variety of backup applications using supercapacitors or batteries. A proprietary low noise switching algorithm optimizes efficiency with capacitor/battery voltages that are above, below or equal to the system output voltage.
The LTC3110HUF#TRPBF can autonomously transition from charge to backup mode or switch modes based on an external command. Pin-selectable Burst Mode operation reduces standby current and improves light-load efficiency, which combined with a 1μA shutdown current make the LTC3110HUF#TRPBF ideally suited for backup applications. Additional features include voltage supervisors for direction control and end of charge, and a general purpose comparator with open-collector output for interfacing with a μC. The LTC3110HUF#TRPBF is available in thermally enhanced, low profile 24-lead TSSOP and 4mm × 4mm QFN packages.
Feature
- VCAP Operating Range: 0.1V to 5.5V
- VSYS Operating Range: 1.71V to 5.25V
- Automatic Switchover from Charge to Backup Mode
- Programmable ±2% Accurate Charge Input Current Limit from 125mA to 2A
- ±1% Backup Voltage Accuracy
- Automatic Backup Capacitor Balancing
- Fixed 1.2MHz Switching Frequency
- Burst Mode® Operation: 40μA Quiescent Current
- Built-In Programmable Multipurpose Comparator with Open-Collector Output
- Open-Collector Outputs to Indicate Direction of Operation and End of Charge
- Thermally Enhanced TSSOP-24 and 4mm × 4mm QFN-24 Packages
Applications
- Supercapacitor Backup Converter and Charger
- Battery Backup Converter and Charger
- Servers, RAID Systems
- RF Systems with Battery/Capacitor Backup
