MAX17262REWL+

The MAX17262REWL+ is an ultra-low power fuel-gauge IC from Analog Devices / Maxim Integrated, designed to monitor single-cell battery packs. It utilizes the Maxim ModelGauge m5 EZ algorithm, which simplifies implementation by eliminating battery characterization requirements and host software interaction. This robust algorithm provides tolerance against battery diversity for most lithium batteries and applications.

The IC offers accurate state-of-charge (SOC) in percentage and remaining capacity in milliampere-hours (mAh) over a wide range of operating conditions. It automatically compensates for cell-aging, temperature, and discharge rate. The ModelGauge m5 EZ algorithm combines short-term accuracy with long-term stability and temperature compensation for industry-leading fuel-gauge accuracy. It also provides accurate estimation of time-to-empty and time-to-full.

Key features include an ultra-low 5.2μA operating current, integrated current sensing options (7mΩ and 30mΩ typical), support for Li+ and variants including LiFePO4, and a choice of internal temperature sensor or external thermistor. The IC communicates via a 2-wire I2C interface and is available in a tiny 9-pin wafer-level package (WLP) with a 0.4mm pitch, measuring 1.5mm x 1.5mm. Its operating temperature range is -40°C to 85°C.

Applications for the MAX17262REWL+ include wearables, smartwatches, Bluetooth headset cases, health and fitness monitors, medical devices, handheld computers, and home/building automation sensors.