LTC4266
Info : RECOMMENDED FOR NEW DESIGNS
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LTC4266

Quad IEEE 802.3at Power Over Ethernet Controller

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $5.96
Features
  • 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
Additional Details
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The LTC4266 is a quad PSE controller designed for use in IEEE 802.3 Type 1 and Type 2 (high power) compliant Power over Ethernet systems. External power MOSFETs enhance system reliability and minimize channel resistance, cutting power dissipation and eliminating the need for heatsinks even at Type 2 power levels. External power components also allow use at very high power levels while remaining otherwise compatible with the IEEE standard. 80V-rated port pins provide robust protection against external faults.

The LTC4266 includes advanced power management features, including current and voltage readback and programmable ICUT and ILIM thresholds. Available C libraries simplify power-management software development; an optional AUTO pin mode provides fully IEEE-compliant standalone operation with no software required. Proprietary 4-point PD detection circuitry minimizes false PD detection while supporting legacy phone operation. Midspan operation is supported with built-in 2-event classification and backoff timing. Host communication is via a 1MHz I2C serial interface.

The LTC4266 is available in a 5mm × 7mm QFN package that significantly reduces board space compared with competing solutions. A legacy-compatible 36-pin SSOP package is also available.

Applications

  • High Power PSE Switches/Routers
  • High Power PSE Midspans
Part Models 8
1ku List Price Starting From $5.96

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Aug 10, 2022

- 22_0174

Laser Top Mark Conversion for SSOP_W Package Assembled in ADPG [PNG]

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Nov 8, 2021

- 20_0245

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC4266CGW#PBF

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Aug 10, 2022

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Laser Top Mark Conversion for SSOP_W Package Assembled in ADPG [PNG]

LTC4266CGW#PBF

PRODUCTION

LTC4266CGW#TRPBF

PRODUCTION

LTC4266IGW#PBF

PRODUCTION

LTC4266IGW#TRPBF

PRODUCTION

Nov 8, 2021

- 20_0245

arrow down

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC4266CGW#PBF

PRODUCTION

LTC4266CGW#TRPBF

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LTC4266CUHF#TRPBF

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LTC4266IGW#PBF

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Software & Part Ecosystem

Software & Part Ecosystem

 
Software Interface Datasheet
Info:False

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.

 
QuikEval
Info:False

The QuikEval system is a USB-based product demonstration and data acquisition system that allows users to quickly evaluate the performance of products. The system consists of a USB Data Acquisition Controller board (DC590B) that connects to individual daughter cards for specific products.

Evaluation Kit

Evaluation Kits 1

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DC1366B

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

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DC1366B

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

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

Product Detail

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.

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