MAX17301X+

Overview

The MAX17301X+ is a standalone pack-side fuel gauge IC with protector and optional SHA-256 authentication for single-cell lithium-ion/polymer batteries. It features a 24 µA IQ standby current, ModelGauge m5 EZ algorithm, and dynamic power functionality. The device monitors voltage, current, temperature, and state to provide protection against over/undervoltage, overcurrent, short-circuit, and over/undertemperature conditions using external high-side N-FETs. It offers industry-leading accuracy with automatic compensation for cell aging, temperature, and discharge rate.

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
• Features dynamic power functionality to estimate instantaneous maximum battery output power without violating system input voltage

Applications

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

Procurement Notes

Verify the specific package type upon ordering, as the MAX17301 series is available in both 14-pin TDFN and 15-bump WLP configurations. Confirm that the 'X' suffix corresponds to the intended footprint and pinout for your design. Ensure compatibility with the required I2C or 1-Wire interface settings. Check for any specific revision differences that might affect register maps or timing characteristics relative to earlier production lots.

Selection Notes

Select this component when high accuracy and security are critical for single-cell lithium applications. The integrated protector reduces BOM count by eliminating discrete protection circuits. Consider the low standby current for battery-operated devices requiring long shelf life. Verify that the external N-FET selection aligns with the gate drive capabilities and current requirements of the target application.

Part Context

Part of the MAX17301–MAX17303/MAX17311–MAX17313 family from Analog Devices Inc./Maxim Integrated. These devices are designed for portable electronics requiring reliable power management. The family shares the ModelGauge m5 EZ algorithm core but varies in package options and authentication features. It complements other ADI battery solutions like the MAX77961 chargers for complete power systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate similar ModelGauge-based fuel gauges from the manufacturer's portfolio if pin-compatible alternatives are needed. Verify electrical parameters and interface compatibility before considering cross-brand replacements.