MAX17049G+T10

The MAX17049G+T10 from Analog Devices (Maxim Integrated) is a micropower current fuel gauge designed for 2-cell lithium-ion battery applications in portable equipment. It employs the sophisticated ModelGauge algorithm to continuously track the battery's state-of-charge (SOC) under varying conditions, eliminating the need for current-sense resistors and battery-learn cycles.

This IC offers precision voltage measurement with ±7.5mV/Cell accuracy and operates with ultra-low quiescent current, drawing only 3μA in hibernate mode and 23μA in active mode. It automatically enters and exits hibernate mode to conserve power. The ModelGauge algorithm ensures accurate SOC reporting without accumulating errors, unlike traditional coulomb counters.

Connectivity is provided via an I2C interface for accessing SOC, voltage, and rate information. The MAX17049G+T10 is available in an 8-pin TDFN-EP package, suitable for surface mounting. Its features make it ideal for applications such as smartphones, tablets, wearables, and medical devices requiring reliable battery monitoring.

Key features include automatic detection of low-current states for power saving, battery-insertion debounce for improved initial SOC estimates, and configurable alerts for low SOC or voltage conditions. Temperature compensation is managed by the system microcontroller.