LTC4266A
LTC4266C

RECOMMENDED FOR NEW DESIGNS

Quad PoE/PoE+/LTPoE++ PSE Controller

Data Sheet
Part Models
10
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
  • Low Power Dissipation
    • 0.25Ω Sense Resistance Per Channel
  • Very High Reliability 4-Point PD Detection
    • 2-Point Forced Voltage
    • 2-Point Forced Current
  • High Capacitance Legacy Device Detection
  • 1MHz I2C Compatible Serial Control Interface
  • Midspan Backoff Timer
  • Supports 2-Pair and 4-Pair Output Power
  • Available in Multiple Power Grades
    • LTC4266A-1: LTPoE++™ 38.7W
    • LTC4266A-2: LTPoE++ 52.7W
    • LTC4266A-3: LTPoE++ 70W
    • LTC4266A-4: LTPoE++ 90W
    • LTC4266C: PoE 13W
  • Available in 38-Lead 5mm × 7mm QFN Package
LTC4266A
LTC4266C
Quad PoE/PoE+/LTPoE++ PSE Controller
Complete 4-Port Ethernet High Power Source Product Package 1
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Documentation

Data Sheet 1

User Guide 1

Data Sheet

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

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Hardware Ecosystem

Parts Product Life Cycle Description
Circuit Monitors 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
Interface Transceivers & Isolators 2
LTM2883
PRODUCTION SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
LTC4310
PRODUCTION Hot-Swappable I2C Isolators
POE Controllers 1
LT4275
RECOMMENDED FOR NEW DESIGNS LTPoE++/PoE+/PoE PD Controller
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Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
DC1815A-D

LTC4266A-4 Demo Board | 4-Port 90W LTPoE++ PSE (requires DC590)

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Product Details

Demonstration circuit 1815A features the LTC4266A quad power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/ classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4266A feature set is a superset of the popular LTC4266. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.


 


eval board
schematic 6
DC1815A-C

LTC4266A-3 Demo Board | 4-Port 70W LTPoE++ PSE (Requires DC590)

Buy Now View Details

Product Details

Demonstration circuit 1815A features the LTC4266A quad power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4266A feature set is a superset of the popular LTC4266. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.

eval board
schematic 7
DC1815A-A

LTC4266A-1 Demo Board | 4-Port 38.7W LTPoE++ PSE (Requires DC590)

Buy Now View Details

Product Details

Demonstration circuit 1815A features the LTC4266A quad power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4266A feature set is a superset of the popular LTC4266. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.

eval board
schematic 8
DC1815A-B

LTC4266A-2 Demo Board | 4-Port 52.7W LTPoE++ PSE (Requires DC590)

Buy Now View Details

Product Details

Demonstration circuit 1815A features the LTC4266A quad power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4266A feature set is a superset of the popular LTC4266. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.
DC1815A-D
LTC4266A-4 Demo Board | 4-Port 90W LTPoE++ PSE (requires DC590)
DC1815A-D Demo Board DC1815A-D Demo Board DC1815A-D Demo Board DC1815A-D Demo Board DC1815A - Schematic
DC1815A-C
LTC4266A-3 Demo Board | 4-Port 70W LTPoE++ PSE (Requires DC590)
DC1815A - Schematic
DC1815A-A
LTC4266A-1 Demo Board | 4-Port 38.7W LTPoE++ PSE (Requires DC590)
DC1815A - Schematic
DC1815A-B
LTC4266A-2 Demo Board | 4-Port 52.7W LTPoE++ PSE (Requires DC590)
DC1815A - Schematic
DC590B
Isolated USB Serial Controller for QuikEval-Compatible Demo Boards
DC590B Demo Board DC590B Demo Board DC590B Demo Board DC590B Demo Board DC590B - Schematic

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