MAX5986AETE+

Overview

The MAX5986AETE+ is a Power-over-Ethernet (PoE) Powered Device (PD) interface controller integrated with a step-down DC-DC converter, compliant with IEEE 802.3af standards. It operates within an input voltage range of 8.7V to 60V and supports Class 1 and Class 2 classifications via a single external resistor. The device features a peak current-mode controlled buck converter with fast transient response, isolation power MOSFET protection, and ultra-low power sleep modes for energy efficiency.

Feature Summary

• Integrates PD interface detection and classification with an efficient step-down DC-DC converter
• Supports IEEE 802.3af-compliant Class 1 and Class 2 Powered Device applications
• Includes built-in isolation power MOSFET with inrush current limiting and operating current limit
• Features sleep and ultra-low power modes to minimize energy consumption during idle states

Applications

• IEEE 802.3af-compliant PoE Powered Devices
• LAN powered network equipment
• Class 1/Class 2 power supply solutions
• Low external part count PD implementations

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's official documentation to confirm feature set alignment. Confirm RoHS compliance status through the latest datasheet revision. Check for obsolescence notices or lifecycle changes directly from Analog Devices. Ensure the TQFN package footprint matches your PCB design requirements before procurement.

Selection Notes

Select this component when designing IEEE 802.3af compliant systems requiring integrated PoE interface and regulation. Consider the wide input voltage range suitable for standard PoE voltages. Evaluate the need for sleep modes if low standby power is critical. Verify that the integrated converter meets the target output current and voltage requirements for the application load.

Part Context

This part belongs to the MAX5986/MAX5987 family of high-efficiency PoE controllers. It is designed to reduce external component count by combining the PD interface logic with a switching regulator. The family targets network infrastructure and industrial automation applications requiring reliable power delivery over Ethernet cables.

Replacement Considerations

The MAX5987A is a related variant that includes an integrated LDO instead of the switching converter. Verify if the application requires linear regulation or if the switching topology of the MAX5986A is necessary for efficiency.