MAX5986AETE+T

Overview

The MAX5986AETE+T is a Power-over-Ethernet (PoE) Powered Device controller compliant with IEEE 802.3af standards, designed for Class 1 and Class 2 applications. It integrates a PD interface with an efficient step-down DC-DC converter to minimize external component count. The device operates within an input voltage range of 8.7V to 60V, supporting up to 6.49W of power delivery. Key electrical specifications include a maximum operating current limit of 323mA and a peak inrush current limit of 60mA. It features sleep and ultra-low power modes for energy efficiency.

Feature Summary

• Integrates PD interface detection and classification signatures with a single external resistor
• Includes an integrated step-down DC-DC converter using peak current-mode control
• Provides isolation power MOSFET with defined inrush and operating current limits
• Supports sleep and ultra-low power modes for enhanced energy conservation

Applications

• IEEE 802.3af-compliant PoE Powered Devices
• Class 1 and Class 2 LAN powered equipment
• Low external part count power supply solutions
• Network infrastructure endpoints requiring integrated regulation

Procurement Notes

Verify the specific suffix 'ETE+' against the manufacturer's official datasheet to confirm package type and tape-and-reel configuration. Ensure compatibility with IEEE 802.3af Class 1/Class 2 requirements. Confirm availability status through authorized distributors as supply may be restricted. Cross-reference thermal performance data for the TQFN-EP-16 package under intended load conditions.

Selection Notes

Select this component when a complete PoE solution with integrated regulation is required to reduce bill-of-materials complexity. It is suitable for designs needing wide input voltage tolerance from standard Ethernet cabling. Consider the integrated current limits for protection schemes without additional discrete components. Evaluate the trade-off between the integrated converter's transient response and external filter requirements.

Part Context

This part belongs to the MAX5986/MAX5987 family of high-efficiency PoE controllers. While the MAX5987A includes a low-dropout regulator, the MAX5986 series focuses on the step-down DC-DC converter topology. These devices are engineered to simplify PoE endpoint design by combining interface logic and power conversion in a single small footprint.

Replacement Considerations

Public confirmed substitute part numbers: MAX5986BETE+, MAX5986CETE+. Verify pinout and feature parity, particularly regarding the presence of sleep modes versus LDO integration in alternative variants.