MAX5971AETI+

Overview

The MAX5971AETI+ is a single-port, 40W Power over Ethernet (PoE) Powered Device (PD) controller compliant with IEEE 802.3af/at standards. It integrates a low on-resistance power MOSFET and current sensing circuitry to minimize external component count. The device operates within a supply voltage range of 32 V to 60 V and supports programmable current limiting. It features a TQFN-EP-28 package suitable for surface mount installation, with an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates a low on-resistance power MOSFET and current sense amplifier to reduce system size and cost.
• Fully compatible with IEEE 802.3af and IEEE 802.3at PoE standards for powered devices.
• Includes programmable current limit control and comprehensive fault protection mechanisms.

Applications

• Single-port IEEE 802.3af/at Powered Devices
• Power-over-Ethernet endpoint modules
• Network infrastructure equipment requiring compact PD solutions

Procurement Notes

Verify the specific suffix 'ETI+' against the manufacturer's official part numbering guide to confirm package type and tape/reel or tube packaging configuration. Ensure that the ordering information matches the exact electrical specifications required for your design, as minor suffix variations may alter thermal or mechanical properties.

Selection Notes

Select this component for designs requiring a highly integrated PoE PD solution that minimizes bill-of-materials complexity. The internal MOSFET simplifies thermal management compared to discrete implementations. Confirm that the 32V to 60V input range aligns with the available PoE power budget in the target network environment.

Part Context

This part belongs to the MAX5971 family of PoE controllers designed by Analog Devices/Maxim Integrated. It serves as a specialized power management IC for networking applications, distinct from the MAX5971B which functions as a Power Sourcing Equipment (PSE) controller. The series focuses on reducing external passive components while maintaining strict compliance with international Ethernet power standards.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.