Milpitas, Calif. − Linear Technology has introduced the LTC3330, a complete regulating energy harvesting solution that integrates a high-voltage energy harvesting power supply, and a synchronous buck-boost DC/DC converter, which is powered by a primary cell battery to create a single non-interruptible output for energy harvesting applications including wireless sensor networks. The LTC3330 delivers up to 50 mA of continuous output current to extend battery life when harvestable energy is available.
The LTC3330 requires no supply current from the battery when providing regulated power to the load from harvested energy and only 750 nA operating when powered from the battery under no-load conditions, said Linear Tech. The LTC3330 automatically transitions to the battery when the harvesting source is no longer available.
The energy harvesting power supply, consisting of a full-wave bridge rectifier that supports AC or DC inputs and a high efficiency buck converter, harvests energy from piezoelectric (AC), solar (DC) or magnetic (AC) sources. The primary cell input powers a buck-boost converter that operates from 1.8 V to 5.5 V at its input when harvested energy is not available to regulate the output whether the input is above, below or equal to the output, said Linear Tech.
The LTC3330’s energy harvesting inputs operate from a voltage range of 3 V to 19 V, AC or DC, making it suitable for a variety of piezoelectric, solar or magnetic energy sources. The device's input undervoltage lockout threshold settings are programmable between 3 V and 18 V, enabling the application to operate the energy harvesting source at its peak power transfer point.
Other features include programmable DC/DC and LDO output voltages, buck-boost peak current limits, a supercapacitor charger/balancer, and an input protective shunt (up to 25 mA at VIN ≥20V).
Availability: The LTC3330EUH is available in a 5- x 5-mm QFN package. An industrial temperature grade version, the LTC3330IUH, is also available. All versions are available from stock.
The parts are available through Linear's distribution channel: ARROW, Digi-Key, Newark, Farnell, Setron, Fintronics, Astute, PT Electronics, Altech, Cytech, Pangia, Comtech, Morrihan, Promate, Chieftron, Sheenbang, Avnet-Israel, Gamma, Toyotsu, TED, Sankyosha, TDH, ITO, Paltek, Jepico, IC Lando, Chip 1 Stop & Elsina.
Pricing: Starts at $3.55 each for the LTC3330EUH, and starts at $3.90 each for LTC3330IUH, both in quantities of 1,000.