330 nA quiescent current sets the energy budget floor
The BQ25504RGTR draws just 330 nA from the supply. For a solar cell or TEG harvester delivering 10 µA, that leaves over 9.6 µA for charging and system overhead—every nanoamp counts when the source is a 1 cm² panel indoors. This is a dedicated energy-harvesting controller, not a general-purpose boost converter. It manages the cold-start, maximum-power-point tracking, and battery over-voltage protection for micro-power sources.
Operates from 2.5 V to 5.25 V, covering single-cell Li-ion, LiFePO4, and supercapacitor storage. The 16-VFQFN Exposed Pad package with a 3x3 mm footprint keeps the board area tight—critical when the harvester itself is smaller than a coin cell.
ROHS3 compliant — no exemption concerns for EU or California market shipments.