1. Products
  2. Power Monitor, Control, and Protection
  3. Power-over-Ethernet (PoE) Interface Controllers
  4. PoE Power Sourcing Equipment (PSE)
  5. MAX5984


Features and Benefits

  • IEEE 802.3af/at Compliant
  • Up to 40W for Single-Port PSE Applications
  • Integrated 0.5Ω Power MOSFET and Sense Resistor
  • 2-Event Pin-Select (MAX5984A/MAX5984B)
  • PD Detection and Classification
  • Programmable Current Limit for Class 5 PDs
  • High-Capacitance Detection for Legacy Devices
  • Supports Both DC and AC Load Removal Detections
  • Current Foldback and Duty Cycle-Controlled Current Limit
  • LED Indicator for Port Status
  • Direct Fast-Shutdown Control Capability
  • Space-Saving, 28-Pin TQFN (5mm × 5mm) Package

Product Details

The MAX5984 is a single-port, power-sourcing equipment (PSE) power controller designed for use in IEEE® 802.3af/at-compliant PSE. This device provides powered device (PD) discovery, classification, current limit, and DC and AC load-disconnect detections. The MAX5984 operates automatically without the need for any software programming and features an integrated power MOSFET and sense resistor. The device also supports new Class 5 and 2-Event classification for detection and classification of high-power PDs. The MAX5984 provides up to 40W to a single port (Class 5 enabled) and still provides high-capacitance detection for legacy PDs.

The MAX5984 provides input undervoltage lockout (UVLO), input overvoltage lockout, overtemperature detection, output voltage slew-rate limit during startup, and LED status indication.

The MAX5984 is available in a space-saving, 28-pin TQFN (5mm x 5mm) power package, and is rated for the extended (-40°C to +85°C) temperature range.


  • Industrial Automation Equipment
  • PoE Repeaters
  • Single-Port PSE End-Point Applications
  • Single-Port PSE Power Injectors (Midspan Applications)
  • Switches/Routers
  • Wireless LAN Access Point/WiMAX® Base Stations

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX5984AETI+ Material Declaration Reliability Data 28-LFCSP-5X5X0.75
MAX5984AETI+T Material Declaration Reliability Data 28-LFCSP-5X5X0.75
MAX5984BETI+ Material Declaration Reliability Data 28-LFCSP-5X5X0.75
MAX5984BETI+T Material Declaration Reliability Data 28-LFCSP-5X5X0.75
Wafer Fabrication Data

Sample & Buy

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Buy Now Pricing

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List Pricing

(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

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