MAX17301G+

Overview

The MAX17301G+ is a standalone pack-side fuel gauge IC designed for single-cell lithium-ion or polymer batteries. It integrates the ModelGauge m5 algorithm to provide accurate state-of-charge readings in milliampere-hours or percentage. The device includes a protector with SHA-256 authentication, utilizing a unique 64-bit ID and a 160-bit secret key to prevent battery cloning. It monitors voltage, current, and temperature to ensure safe operation against over/undervoltage, overcurrent, short-circuit, and thermal conditions via external high-side N-FETs.

Feature Summary

• Integrates ModelGauge m5 algorithm combining coulomb counting with voltage-based stability for high accuracy across varying discharge rates and temperatures.
• Includes hardware protection features for over/undervoltage, overcurrent, short-circuit, and over/undertemperature using external high-side N-FETs.
• Features integrated SHA-256 authentication with a unique 64-bit ID and 160-bit secret key to secure battery packs against cloning.
• Provides dynamic power functionality to calculate instantaneous maximum battery output power without violating minimum system input voltage.

Applications

• Smartphones and tablets
• Smartwatches and wearables
• Medical devices and health monitors
• Digital cameras and action cameras

Procurement Notes

Verify the specific suffix 'G+' indicates lead-free and RoHS compliance status according to the manufacturer's official documentation. Confirm the package type matches the required PCB layout, typically a 3mm x 3mm 14-pin TDFN. Ensure the design supports the necessary external high-side N-FETs for the integrated protection circuitry. Validate that the host system can interface with the 1-Wire or I2C communication protocols supported by the device.

Selection Notes

Select this component when precise state-of-charge monitoring is critical for single-cell lithium-based battery systems. It is suitable for applications requiring anti-cloning security through integrated SHA-256 authentication. Choose this part if the design necessitates combined fuel gauging and protection functions to reduce bill of materials count. Consider the low standby current requirements for portable devices where battery longevity is a primary constraint.

Part Context

This device belongs to the MAX17301–MAX17303 series from Analog Devices Inc./Maxim Integrated. These parts are part of the ModelGauge family, which utilizes advanced algorithms for fuel gauging. The series is designed to replace traditional fuel gauge solutions by integrating measurement, protection, and security into a single compact package, targeting modern portable electronics.

Replacement Considerations

Consult the manufacturer's official substitution guide for verified alternatives within the MAX1730x series. Verify pin compatibility and algorithm differences if replacing with other ModelGauge variants. Do not assume functional equivalence with non-authenticated fuel gauges due to the specific security features present in this part number.

FAQ

How does the MAX17301G+ prevent battery pack cloning?

It integrates SHA-256 authentication with a unique 64-bit ID and a 160-bit secret key to verify the authenticity of the battery pack.

What interfaces are supported for data access?

The IC provides access to data and control registers via a Maxim 1-Wire or 2-wire I2C interface.