MAX17262REWL+T

The MAX17262REWL+T is an ultra-low power fuel gauge integrated circuit from Analog Devices that utilizes the Maxim ModelGauge m5 EZ algorithm. This IC is designed to monitor single-cell battery packs and supports internal current sensing, offering optimal performance for batteries with capacities ranging from 30mAh to 6Ah. The ModelGauge m5 EZ algorithm simplifies implementation by eliminating the need for battery characterization and reducing host software interaction.

This fuel gauge IC provides accurate state-of-charge (SOC) in percentage and remaining capacity in milliampere-hours (mAh) by automatically compensating for cell aging, temperature, and discharge rate. It offers precise measurements of current, voltage, and temperature, with the temperature being measured via an internal sensor or an external thermistor. The device communicates through a 2-wire I2C interface.

The MAX17262REWL+T is available in a compact 9-pin wafer-level package (WLP) with a 0.4mm pitch, measuring 1.5mm x 1.5mm. Its low operating current of 5.2μA makes it suitable for power-sensitive applications. The IC also provides accurate estimation of time-to-empty and time-to-full, along with alerts for voltage, SOC, temperature, and current changes.

Key features include its robust algorithm that tolerates battery diversity, eliminates error near empty voltage, and avoids coulomb-counter drift. It supports Li+ and variants including LiFePO4 chemistries. Applications include wearables, smartwatches, Bluetooth headset cases, health and fitness monitors, medical devices, and handheld computers.