Alternative Parts

  • LTC4279

    Single Port PoE/PoE+/LTPoE++ PSE Controller


Features and Benefits

  • 30W PSE Output Power
  • IEEE 802.3af® Compatible
  • Operation from a Single 56V Supply
  • Fully Autonomous Operation Without a Microcontroller
  • Internal MOSFET with Thermal Protection
  • Precision Inrush Control with Internal Sense Resistor
  • Forced Current PD Detection for Noise Immunity
  • AC and DC Disconnect Sensing
  • Legacy PD Detection
  • Robust Short-Circuit Protection
  • Pin-Selectable Detection Backoff for Midspan PSEs
  • LED Driver Indicates Port On and Blinks Status Codes
  • Available in a Miniature14-Pin 4mm × 3mm DFN Package

Product Details

The LTC4263-1 is a high power, single PSE controller for use in Power over Ethernet systems. The internal current limit and short-circuit protection are designed to provide up to 30W of PSE output power for power hungry PoE applications such as WAPs, security cameras and RFID readers.

The LTC4263-1 includes IEEE 802.3af compliant PD detection circuitry along with selectable AC and DC disconnect sensing, allowing seamless operation in conventional IEEE 802.3af systems as well as propriety, high power applications. The LTC4263-1 simplifi es PSE implementation, needing only a single supply and a small number of passive support components. Onboard control algorithms provide complete PSE functionality without the need of a microcontroller and built-in foldback and thermal shutdown provide comprehensive fault protection. An LED pin indicates the state of the port and detection backoff timing is confi gurable for either endpoint or midspan operation.

The LTC4263-1 is available in a miniature 14-pin 4mm × 3mm DFN package.


  • High Power Endpoint/Midspan PSEs
  • Single-Port or Multi-Port Power Injectors
  • Low Port Count PSEs
  • Environment B PSEs
  • Standalone PSEs

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.

Product Recommendations

LTC4263-1 Companion Parts

Recommended Related Parts

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.


LTC4263-1 Discussions

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The USA 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. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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