MAX17301G+T

Overview

The MAX17301G+T is a standalone pack-side fuel gauge IC featuring integrated protector and optional SHA-256 authentication for single-cell lithium-ion or polymer batteries. It operates with a 24 µA active current and utilizes the ModelGauge m5 algorithm to provide accurate state-of-charge measurements in mAh or percentage. The device monitors voltage, current, temperature, and battery status to enable protection against over/undervoltage, overcurrent, short-circuit, and thermal extremes using external high-side N-FETs. It supports dynamic power functionality and includes non-volatile memory for independent operation.

Feature Summary

• Integrates ModelGauge m5 EZ algorithm combining coulomb counter linearity with voltage-based stability for precise state-of-charge estimation
• Provides comprehensive battery protection including overvoltage, undervoltage, overcurrent, short-circuit, and thermal limits via external FETs
• Includes SHA-256 authentication with unique 64-bit ID to prevent battery pack cloning and unauthorized access
• Features dynamic power capability to estimate instantaneous maximum battery output power without violating system input voltage constraints

Applications

• Smartphones and tablets
• Two-in-one laptops
• Smartwatches and wearable devices
• Medical devices and health monitors
• Digital cameras and handheld terminals

Procurement Notes

Verify that the specific suffix matches the required package type, as the MAX17301 series offers both TDFN and WLP options. Confirm whether the SHA-256 authentication feature is enabled for the specific part number variant. Ensure compatibility with the intended battery chemistry and check if external high-side N-FETs are included in the bill of materials for the protection circuit implementation.

Selection Notes

Select this component when high accuracy in state-of-charge reporting is critical for portable electronics. Consider the low quiescent current requirements for battery-powered applications where standby time is essential. Evaluate the need for anti-cloning security features which necessitate the inclusion of the SHA-256 module. Verify that the system design can accommodate the necessary external components for the integrated protection scheme.

Part Context

This part belongs to the MAX17301–MAX17303 and MAX17311–MAX17313 family of ModelGauge m5 EZ fuel gauges. These devices are designed for single-cell lithium-ion and polymer battery packs. The family shares core algorithmic capabilities but may differ in package configurations and specific authentication implementations. They represent an evolution in fuel gauge technology by integrating protection logic directly with the measurement engine.

Replacement Considerations

Public confirmed substitute part numbers: MAX17301X+T, MAX17303G+T, MAX17311G+T.