Maxim Integrated MAX5991AETP+ Overview

The MAX5991AETP+ from Maxim Integrated is a sophisticated Power over Ethernet (PoE) interface controller that is designed to implement the Powered Device (PD) side of a PoE connection. It is compliant with the IEEE 802.3at standard, also known as PoE+, and is backward compatible with the IEEE 802.3af PoE standard. This device is ideal for a wide range of applications that require remote power, such as IP cameras, wireless access points, VoIP phones, and many other networked devices.

Key Features

• IEEE 802.3at Compliant: The MAX5991AETP+ supports the higher power capabilities of the PoE+ standard, allowing for devices to receive up to 25.5W of power over an Ethernet cable.
• Integrated Power MOSFET: This device integrates a power MOSFET, simplifying the design and reducing external component count.
• Advanced Power Management: It features programmable classification, under-voltage lockout, and inrush current control for efficient power management.
• Thermal Protection: The controller includes over-temperature protection, ensuring reliable operation under various conditions.
• LED Indicators: Built-in LED drivers provide visual status indicators for power, overload, and fault conditions.

Applications

• IP Surveillance Cameras
• Wireless Network Access Points
• VoIP Phones
• Point of Sale (PoS) Terminals
• Networked Printers and Appliances

Technical Specifications

The MAX5991AETP+ operates over a wide input voltage range and features a 100V absolute maximum rating on the hot-swap FET. It is offered in a compact 20-pin TQFN package with an exposed pad for enhanced thermal performance. The operating temperature range of -40°C to +85°C makes it suitable for a variety of environments.

Conclusion

Maxim Integrated's MAX5991AETP+ is an efficient and reliable solution for adding PoE+ capabilities to networked devices. Its integration of key features and compliance with the latest PoE standards makes it a top choice for designers looking to simplify their PD implementations while ensuring robust performance and protection.