Ultra-low-power boost regulator taps energy-harvesting sources

April 02, 2014 // By Graham Prophet
Analog Devices’ ADP5090 carries out low-light power conversion and has multiple power path management capability: ADI positions it as the most efficient ultra-low-power boost regulator for photovoltaic and thermoelectric energy harvesting systems.

The ADP5090 ultra-low-power boost regulator is, ADI says, a leap forward in energy harvesting technology with efficient conversion of the harvested power (as low as 10 µW) with sub- µW operational losses that stores the maximum amount of energy for future operation. Harnessing “indoor” ambient light as a viable power source has become a growing trend in wireless sensor network applications.

Features include;

Efficient conversion of harvested limited power down to 10 µW – 1-mW range with sub-µW operation losses

Programmable maximum power point tracking (MPPT) with open-circuit voltage sensing ensures greatest amount of energy extracted from harvester

250-nA quiescent current in deep-sleep mode prolongs operation time with minimised loss of ambient energy

Integrated charge pump circuitry enables cold start at 380-mV input voltage with no energy on system node.

In a 3 x 3-mm 16-lead LFCSP, the device costs $2.50 (1000).

Analog Devices; www.analog.com/ADP5090