LTC3330 Energy Harvesting Buck-Boost Converters

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 V_OUT 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.