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LTC®3110 Supercapacitor Charger

Linear Technology's 2 A buck-boost supercapacitor charger features bi-directional operation for fast charging and system backup

Image of Linear Technology's LTC3110 Supercapacitor ChargerLinear Technology's LTC3110 is a 2 A bi-directional buck-boost DC/DC regulator with capacitor charger and balancer. Its wide 0.1 V to 5.5 V capacitor / battery voltage and 1.8 V to 5.25 V 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 LTC3110 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 1 μA shutdown current, make the LTC3110 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 LTC3110 is available in thermally enhanced, low-profile 24-lead TSSOP and 4 mm × 4 mm QFN packages.

Image of Linear Technology's LTC3110 Supercapacitor Charger Schematic
Image of Linear Technology's LTC3110 Supercapacitor Charger Graph
Features
  • VCAP operating range: 0.1 V to 5.5 V
  • VSYS operating range: 1.71 V to 5.25 V
  • Automatic switchover from charge to backup mode
  • Programmable ±2% accurate charge input current
  • limit from 125 mA to 2 A
  • ±1% backup voltage accuracy
  • Automatic backup capacitor balancing
  • Fixed 1.2 MHz switching frequency
  • Burst Mode operation: 40 μA 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 24-TSSOP  and 4 mm × 4 mm 24-QFN packages
Applications
  • Supercapacitor backup converter and charger
  • Battery backup converter and charger 
  • Servers, RAID systems
  • RF Systems with battery / capacitor backup

LTC3110 Supercapacitor Charger

ImageManufacturer Part NumberDescriptionAvailable Quantity
IC REG BUCK BOOST ADJ 2A 24QFNLTC3110EUF#PBFIC REG BUCK BOOST ADJ 2A 24QFN5094 - ImmediateView Details
IC REG BUCK BOOST ADJ 2A 24QFNLTC3110IUF#PBFIC REG BUCK BOOST ADJ 2A 24QFN780 - ImmediateView Details
IC REG BUCK BOOST ADJ 2A 24TSSOPLTC3110EFE#PBFIC REG BUCK BOOST ADJ 2A 24TSSOP662 - ImmediateView Details
IC REG BUCK BOOST ADJ 2A 24TSSOPLTC3110IFE#PBFIC REG BUCK BOOST ADJ 2A 24TSSOP178 - ImmediateView Details
Published: 2015-08-31