Monitor, Control and Protection Power-over-Ethernet (PoE) Interface Controllers PoE Powered Device (PD)

For New Designs

LTC4265 - IEEE 802.3 at High Power PD Interface Controller with 2-Event Classification Recognition

LT2940 - Power and Current Monitor

LT4275 - LTPoE++/PoE+/PoE PD Controller

LTC4264 - High Power PD Interface Controller with 750mA Current Limit

Features

  • Complete High Power PD Interface Controller
  • IEEE 802.3af® Compliant
  • Onboard 750mA Power MOSFET
  • Complementary Power Good Outputs
  • Flexible Auxiliary Power Options
  • Precision Dual Current Limit with Disable
  • Programmable Classification Current to 75mA
  • Onboard 25k Signature Resistor with Disable
  • Undervoltage Lockout
  • Complete Thermal Overload Protection
  • Available in Low Profile (4mm × 3mm) DFN Package

Typical Application

LTC4264 Typical Application
LTC4264 Typical Application

Description

The LTC4264 is an integrated Powered Device (PD) interface controller intended for IEEE 802.3af Power over Ethernet (PoE) and high power PoE applications up to 35W. By including a precision dual current limit, the LTC4264 keeps inrush below the IEEE802.3af current limit levels to ensure interoperability success while allowing for high power PD operation. The LTC4264 includes a field-proven power MOSFET delivering up to 750mA to the PD load while maintaining compliance with the IEEE802.3af standard. Complementary power good outputs allow the LTC4264 to interface directly with a host of DC/DC converter products. The LTC4264 provides a complete signature and power interface solution for PD designs by incorporating the 25k signature resistor, classification circuitry, input current limit, undervoltage lockout, thermal overload protection, signature disable and power good signaling.

The LTC4264 PD interface controller can be used along with a variety of Linear Technology DC/DC converter products to provide a complete, cost effective power solution for high power PD applications.

The LTC4264 is available in the space-saving low profile (4mm × 3mm) DFN package.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LTC4264CDE#PBF 4x3 DFN-12 DE/UE C 05-08-1695 Yes
LTC4264CDE#TRPBF 4x3 DFN-12 DE/UE C 05-08-1695 Yes
LTC4264IDE#PBF 4x3 DFN-12 DE/UE I 05-08-1695 Yes
LTC4264IDE#TRPBF 4x3 DFN-12 DE/UE I 05-08-1695 Yes


LTC4264 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LTC4264CDE#PBF 4x3 DFN-12 C $2.57 $1.80 Yes
LTC4264CDE#TRPBF 4x3 DFN-12 C $1.90 Yes
LTC4264IDE#PBF 4x3 DFN-12 I $3.07 $2.15 Yes
LTC4264IDE#TRPBF 4x3 DFN-12 I $2.25 Yes
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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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1049A LTC4264 - High Power PD Interface Controller with 750mA Current Limit $75.00
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Click here to view our complete list of demo boards

Applications

  • 802.11n Access Points
  • High Power VoIP Video Phones
  • RFID Reader Systems
  • PTZ Security Cameras and Surveillance Equipment

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

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