MAX5991AETP+T

Overview

The MAX5991AETP+T is a Power over Ethernet (PoE) controller compliant with IEEE 802.3af standards, designed for single-channel applications. It operates within an input voltage range of 8.7 V to 60 V and features an internal switch. The device draws a supply current of 4.8 mA and supports a maximum power output of 6.49 W. It includes auxiliary sense capabilities for enhanced monitoring. The component is housed in a 20-WFQFN package with an exposed pad, suitable for surface-mount installation.

Feature Summary

• Compliant with IEEE 802.3af PoE standards
• Integrates an internal power switch
• Supports auxiliary sensing functions

Applications

• Power over Ethernet endpoint devices
• Network infrastructure equipment requiring 802.3af compliance
• Single-channel PoE power management systems

Procurement Notes

Verify the exact suffix against official Analog Devices documentation to confirm package type and temperature grade. Confirm RoHS compliance status through the manufacturer's latest product data sheet. Ensure the ordering part number matches the specific variant required for your design, as suffixes may indicate differences in packaging or environmental ratings.

Selection Notes

Select this component for designs requiring a standalone IEEE 802.3af compliant PoE controller with integrated switching. Consider the 20-WFQFN package constraints for thermal management and PCB layout. Verify that the 8.7 V to 60 V input range aligns with the system's power delivery requirements. Check for availability of alternative packages if space constraints differ from the standard TQFN form factor.

Part Context

The MAX5991 series represents Maxim Integrated's solution for PoE endpoints, simplifying power delivery over Ethernet cabling. This specific model integrates control logic and power switching into a compact footprint. It serves as a key component in network hardware where efficient power extraction and protocol compliance are critical for operation.

Replacement Considerations

Consult official Analog Devices substitution guides for verified alternatives. Generic replacements may not match the specific IEEE 802.3af compliance or pinout configuration.