LTC3330 Energy Harvesting Buck-Boost Converters

Featured Product from Digi-Key Electronics


Power by Linear / Analog Devices’ LTC3330 is a high-voltage energy harvesting power supply plus a DC/DC converter. The energy harvesting power supply, consisting of an integrated full-wave bridge rectifier and a high voltage buck converter, harvests energy from piezoelectric, solar, or magnetic sources. The primary cell input powers a buck-boost converter capable of operation down to 1.8 V at its input. Either DC/DC converter can deliver energy to a single output. The buck operates when harvested energy is available, reducing the quiescent current draw on the battery to essentially zero, thereby extending the life of the battery. The buck-boost powers VOUT only when harvested energy goes away.

A low noise LDO post regulator and a supercapacitor balancer are also integrated, accommodating a wide range of output storage configurations. Voltage and current settings for both inputs and outputs are programmable via pin-strapped logic inputs. The LTC3330 is available in a QFN-32 package that has an operating temperature range of -40°C to +85°C. The LTC3330 is ideal for alternative energy applications found in solar power, energy harvesting, and primary cell backup applications.

Features    
  • Quiescent current: 750 nA at no-load
  • Dual input, single output DC/DCs with input prioritize
    • Energy harvesting input: 3.0 V to 19 V buck DC/DC
    • Primary cell input: 1.8 V to 5.5 V buck-boost DC/DC
  • Zero battery IQ when energy harvesting source is available
  • LDO post regulator
  • Integrated supercapacitor balancer
 
  • Up to 50 mA of output current
  • Integrated low loss full-wave bridge rectifier
  • 5 mm × 5 mm QFN-32 package
  • Input protective shunt: Up to 25 mA at VIN ≥ 20 V
  • Programmable DC/DC and LDO output voltages, buck UVLO, and buck-boost peak input current
Applications    
  • Energy harvesting
  • Mobile asset tracking
  • Solar powered 
 
  • Primary cell backup
  • HVAC sensors
  • Security devices