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

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LTC4279IS#PBF General Description

The LTC4279 is an autonomous single port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1, Type 2 and LTPoE++ compliant Power over Ethernet (PoE) systems. The LTC4279 provides fully autonomous IEEE 802.3 and LTPoE++ compliant operation without a microcontroller. The LTC4279 simplifies PSE implementation, requiring only a single supply and a small number of passive support components.

Analog Devices, Inc Inventory

Key Features

  • Compliant with IEEE 802.3at Type 1 and 2
  • Supports LTPoE++® Up to 90W
  • Supports Dual-Signature PDs
  • Fully Autonomous Operation without Microcontroller
  • Very Low Power Dissipation
    • 0.1Ω Sense Resistance
    • Low RDS(ON) External MOSFET
  • Very High Reliability 4-Point PD Detection
    • 2-Point Forced Voltage and Forced Current
  • Robust Short-Circuit Protection
  • Cable Surge Protected ±80V OUT pin
  • Classification Dependent ICUT and ILIM Current Thresholds
  • Supports 2-Pair and 4-Pair Output Power
  • UltraPWR Mode Supports Custom PDs up to 123W
  • Pin-Selectable Detection Backoff Timer for Midspans
  • Pin Programmable Legacy PD Detection
  • Pin Programmable Maximum Power Mode
  • Status LED Pin
  • Available in 20-Pin QFN and 16-Pin SO Packages
Analog Devices, Inc Original Stock


  • PoE PSE Endpoints (Switch/Router)
  • PoE Midspan Power Injectors
  • Power Forwarders
  • Femto Cells
  • Security Systems
Analog Devices, Inc Inventory


model LTC4279IS#PBF package 16-Lead SOIC (Narrow 0.15 Inch)
packingQty Tube,50 packingOption Tube
packageType 05-08-1610 (S16) rohs roHSY
lifeCycle production tempRange -40 to 85C
Manufacturer Analog Devices Inc. Product Category Power Switch ICs - POE / LAN
RoHS Details Type Power Sourcing Equipment - PSE
Mounting Style SMD/SMT Package / Case SOIC-16
Brand Analog Devices Operating Supply Current 1.7 mA
Product Type Power Switch ICs - POE / LAN Series LTC4279
Factory Pack Quantity 50 Subcategory Switch ICs
Unit Weight 0.085786 oz

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Our products are mainly transported and delivered by DHL, FedEx, UPS and other logistics partners on site -- Available to 200+ countries.


AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.

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Our policies and procedures are designed to ensure compliance with various quality specifications and to quickly resolve quality-related issues.

We promise to provide 365 days quality assurance service for all our products.

If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.


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LTC4279IS#PBF Datasheet PDF

Preliminary Specification LTC4279IS#PBF PDF Download

LTC4279IS#PBF PDF Preview

Availability: 6105 pieces

Qty. Unit Price(USD) Ext. Price
1+ $6.405 $6.40
200+ $2.479 $495.80
500+ $2.392 $1,196.00
1000+ $2.350 $2,350.00

The prices below are for reference only.