Datasheet Linear Technology LTC3331IUH#TRPBF

LTC3331
Nanopower Buck-Boost
DC/DC with Energy Harvesting
Battery Charger
DESCRIPTION FEATURES Dual Input, Single Output DC/DCs with Input
Prioritizer
nn Energy Harvesting Input: 3.0V to 19V Buck DC/DC
nn Battery Input: Up to 4.2V Buck-Boost DC/DC
nn 10mA Shunt Battery Charger with Programmable
Float Voltages: 3.45V, 4.0V, 4.1V, 4.2V
nn Low Battery Disconnect
nn Ultra Low Quiescent Current: 950nA at no Load
nn Integrated Supercapacitor Balancer
nn Up to 50mA of Output Current
nn Programmable DC/DC Output Voltage, Buck UVLO,
and Buck-Boost Peak Input Current
nn Integrated Low-Loss Full-Wave Bridge Rectifier
nn Input Protective Shunt: Up to 25mA at V ≥ 20V
IN
nn 5mm × 5mm QFN-32 Package The LTC®3331 integrates a high voltage energy harvesting
power supply plus a buck-boost DC/DC powered from a
rechargeable battery to create a single output supply for
alternative energy applications. A 10mA shunt allows simple …