1-cell Li-Ion fuel gauge with I²C
The MAX17260BEWL+T is a single-cell Li-Ion battery monitor from Analog Devices' ModelGauge™ series, communicating over an I²C interface. It fits into the 9-WLP (1.47x1.45) package — a tiny 1.47 mm × 1.45 mm wafer-level package that demands careful board layout but saves real estate in a compact portable design.
Active production, ROHS3, surface-mount
Supplied in Tape & Reel (TR) or Cut Tape (CT) options, surface-mount only. The 9-WLP package is hand-solderable with a hot-air rework station and a stencil — not a breadboard-friendly part, but doable for a prototype run if you have the right tip and flux.
What the I²C fuel gauge means for your BOM
With an I²C interface, the MAX17260BEWL+T reports state-of-charge, voltage, current, and temperature directly to a host MCU without an ADC channel or a separate coulomb-counter. The single-cell support targets Li-Ion packs in wearables, IoT sensors, and single-cell portable instruments. The ModelGauge™ algorithm compensates for battery aging and temperature — the host reads the fuel level over I²C rather than running its own curve-fitting. This saves firmware development time compared to a raw voltage-based gauge.