Linear launch Nanopower energy harvesting solution

6th August 2013

Nat Bowers

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Datasheet

Linear Technology has today introduced a complete regulating energy harvesting solution, the LTC3330. Delivering up to 50mA of continuous output current to extend battery life, the LTC3330 requires no supply current from the battery when providing regulated power to the load from harvested energy. It also requires just 750nA to operate when powered from the battery under no-load conditions.

Suited for energy harvesting applications such as those in wireless sensor networks, the LTC3330 integrates a high voltage energy harvesting power supply and a synchronous buck-boost DC-DC converter powered by a primary cell battery, creating a single non-interruptible output. Comprised of a full-wave bridge rectifier accommodating AC or DC inputs and a high efficiency buck converter, the LTC3330 harvests energy from piezoelectric (AC), solar (DC) or magnetic (AC) sources. The primary cell input powers a buck-boost converter that operates from 1.8V to 5.5V at its input when harvested energy is not available to regulate the output. When the harvesting source is no longer available, the LTC3330 automatically transitions to the battery.

Suited for a wide array of piezoelectric, solar or magnetic energy sources, the LTC3330 integrates energy harvesting inputs that operate from a voltage range of 3V to19V, AC or DC. Its input undervoltage lockout threshold settings are programmablebetween 3V and 18V. This enables the application to operate the energy harvesting source at its peak power transfer point. Additional features of Linear’s LTC3330 include buck-boost peak current limits, supercapacitor charger-balancer, an input protective shunt (up to 25mA at VIN ≥20V) and programmable DC-DC and LDO output voltages.

LTC3330 key features:

Dual Input, Single Output DC-DCs with Input Prioritizer

Energy Harvesting Inputs: 3.0V to 19V Buck DC-DC
Primary Cell Input: 1.8V to 5.5V Buck-Boost DC-DC

Zero Battery IQ when Powering Load from Harvested Energy
Ultralow Quiescent Current: 750nA at No-Load when Powered from Battery
Low Noise LDO Post Regulator
Integrated Supercapacitor Balancer
Up to 50mA of Output Current
Programmable DC-DC & LDO Output Voltages, Buck UVLO & Buck-Boost Peak Input Current
Integrated Low Loss Full-Wave Bridge Rectifier
Input Protective Shunt – Up to 25mA at VIN ≥ 20V
5mm × 5mm QFN-32 Package

Pricing, packaging and availability

Available in a 5mm x 5mm QFN package, pricing for the LTC3330 starts at $3.55 (USD) each for 1,000-piece quantities. An industrial temperature grade version, the LTC3330IUH, is also available with pricing starting at $3.90 (USD) each for 1,000-piece quantities. Both versions are available now from stock.