LTC4266

RECOMMENDED FOR NEW DESIGNS

Quad IEEE 802.3at Power Over Ethernet Controller

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Part Models
8
1ku List Price
Starting From $5.96
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Part Details

  • Four Independent PSE Channels
  • Compliant with IEEE 802.3at Type 1 and 2
  • 0.34Ω Total Channel Resistance
    • 130mW/Port at 600mA
  • Advanced Power Management
    • 8-Bit Programmable Current Limit (ILIM)
    • 7-Bit Programmable Overload Currents (ICUT)
    • Fast Shutdown of Preselected Ports
    • 14.5-Bit Port Current/Voltage Monitoring
    • 2-Event Classification
  • Very High Reliability 4-Point PD Detection
    • 2-Point Forced Voltage
    • 2-Point Forced Current
  • High Capacitance Legacy Device Detection
  • LTC4259A-1 and LTC4258 Pin and SW Compatible
  • 1MHz I2C Compatible Serial Control Interface
  • Midspan Backoff Timer
  • Supports Proprietary Power Levels Above 25W
  • Available in 38-Pin 5mm × 7mm QFN and 36-Pin SSOP Packages
LTC4266
Quad IEEE 802.3at Power Over Ethernet Controller
Complete 4-Port Ethernet High Power Source Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 3

User Guide 1

Technical Articles 2

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

Evaluation Software 1

Software Interface Datasheet

The software interface datasheet for this PSE may be requested from the Software Request Form (SRF). This datasheet describes the I2C interface and programming details for the respective PSE controller.

Hardware Ecosystem

Parts Product Life Cycle Description
I²C Isolators 1
LTM2883
PRODUCTION SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
PoE Power Sourcing Equipment (PSE) 2
LTC4266A
LTC4266C
Quad PoE/PoE+/LTPoE++ PSE Controller
LTC4270
RECOMMENDED FOR NEW DESIGNS 12-Port PoE/PoE+/LTPoE++ PSE Analog Controller
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
DC1366B

LTC4266 Demo Board | 25.5W PoE + 4-Port Midspan PSE (Requires DC590)

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Product Details

Demonstration circuit DC1366B features the LTC4266, a quad network power controller with I2C® interface, designed for use in IEEE 802.3at compliant Power Sourcing Equipment (PSE). Integrated into a tiny 5mm × 7mm 38-pin QFN package are four independent channels controlling external N-channel power MOSFETs.
DC1366B
LTC4266 Demo Board | 25.5W PoE + 4-Port Midspan PSE (Requires DC590)
DC1366B Application Circuit DC1366B Application Circuit DC1366B Application Circuit DC1366B Application Circuit EA Certified 4

Latest Discussions

1 Years Ago
RE: LTC4266 circuit powered via external PoE
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