MAX17260SEWL+T

The MAX17260SEWL+T is an ultra-low power fuel gauge integrated circuit from Analog Devices Inc. that utilizes the Maxim ModelGauge m5 EZ algorithm for precise battery monitoring. This IC is designed to monitor single-cell lithium-ion battery packs and supports both high-side and low-side current sensing. The ModelGauge m5 EZ algorithm simplifies implementation by eliminating the need for battery characterization and reducing host software interaction, while providing tolerance against battery diversity.

This fuel gauge IC offers industry-leading accuracy by combining the short-term accuracy of a coulomb counter with the long-term stability of a voltage-based fuel gauge, all enhanced by temperature compensation. It automatically compensates for cell aging, temperature, and discharge rate, delivering accurate state-of-charge (SOC) in percentage and remaining capacity in mAh. The device provides precision measurements of current, voltage, and temperature, with temperature measured via an internal sensor or an external thermistor. Communication is handled through a 2-wire I2C interface.

The MAX17260SEWL+T is available in a tiny 9-pin WLP package with a 0.4mm pitch, measuring 1.5mm x 1.5mm. It operates over a temperature range of -40°C to 85°C. Applications include wearables, smartwatches, tablets, Bluetooth headsets, digital cameras, and medical devices, among others.

Key features include its ModelGauge m5 EZ algorithm, low 5.1μA operating current, accurate current sensing options, a wide sense resistor range (1mΩ to 1000mΩ), and support for Li+ variants including LiFePO4. It also provides dynamic power estimates, time-to-empty and time-to-full estimations, and alert indicators for voltage, SOC, temperature, and current.