MAX5986CETE+

Overview

The MAX5986CETE+ is a Power Switch IC designed for IEEE 802.3af/af-compliant Powered Devices (PDs) in Power-over-Ethernet systems. It integrates the PD interface with an efficient step-down DC-DC converter, offering a low external part count solution. The device supports Class 1 and Class 2 classification signatures using a single external resistor. Key electrical parameters include an operating current limit of 323mA and a maximum inrush current limit of 60mA. The integrated converter operates within a wide input voltage range from 8.7V to 60V.

Feature Summary

• Integrates PD interface with detection and classification signature capabilities
• Includes an efficient step-down DC-DC converter with peak current-mode control
• Provides isolation power MOSFET with defined inrush and operating current limits

Applications

• IEEE 802.3af-compliant Powered Device implementations
• Power-over-Ethernet system power supply solutions
• Class 1 and Class 2 PD applications requiring integrated regulation

Procurement Notes

Verify the specific suffix 'C' against the manufacturer's official datasheet to confirm the exact feature set, as variations exist within the MAX5986 family. Ensure compatibility with IEEE 802.3af standards for your target application. Cross-reference the package type and thermal requirements during sourcing to match design constraints.

Selection Notes

Select this component when a complete PoE PD solution with integrated regulation is required to minimize external components. Consider the wide input voltage range and current limits for robust operation. Evaluate the need for sleep modes if ultra-low power consumption is critical, noting that specific variants may offer these features.

Part Context

This part belongs to the MAX5986A–MAX5986C/MAX5987A series, which provides complete power-supply solutions for IEEE 802.3af-compliant Class 1/Class 2 Powered Devices. The series integrates the PD interface with an efficient DC-DC converter, distinguishing it from discrete PoE controller designs by reducing the overall bill of materials.

Replacement Considerations

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