1. Products
  2. Power Monitor, Control, and Protection
  3. Power-over-Ethernet (PoE) Interface Controllers
  4. PoE Powered Device (PD)
  5. LTC4267


Alternative Parts

Overview

Features and Benefits

  • Complete Power Interface Port for IEEE 802®.3af Powered Device (PD)
  • Onboard 100V, 400mA UVLO Switch
  • Precision Dual Level Inrush Current Limit
  • Integrated Current Mode Switching Regulator
  • Onboard 25kΩ Signature Resistor with Disable
  • Programmable Classification Current (Class 0-4)
  • Thermal Overload Protection
  • Power Good Signal
  • Integrated Error Amplifier and Voltage Reference
  • Low Profile 16-Pin SSOP and 3mm × 5mm DFN Packages

Product Details

The LTC4267 combines an IEEE 802.3af compliant Powered Device (PD) interface with a current mode switching regulator, providing a complete power solution for PD applications. The LTC4267 integrates the 25kΩ signature resistor, classification current source, thermal overload protection, signature disable and power good signal along with an undervoltage lockout optimized for use with the IEEE-required diode bridge. The precision dual level input current limit allows the LTC4267 to charge large load capacitors and interface with legacy PoE systems.

The current mode switching regulator is designed for driving a 6V rated N-channel MOSFET and features programmable slope compensation, soft-start, and constant frequency operation, minimizing noise even with light loads. The LTC4267 includes an onboard error amplifier and voltage reference allowing use in both isolated and nonisolated configurations.

The LTC4267 is available in space saving, low profile 16-pin SSOP or DFN packages.

Applications

  • IP Phone Power Management
  • Wireless Access Points
  • Security Cameras
  • Power over Ethernet

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (4)

Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTspice

Models for the following parts are available in LTspice:

LTC4267
LTC4267-1
LTC4267-3

Product Recommendations

LTC4267 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC4267CDHC#PBF Material Declaration Reliability Data 16-Lead DFN (5mm x 3mm w/ EP)
LTC4267CDHC#TRPBF Material Declaration Reliability Data 16-Lead DFN (5mm x 3mm w/ EP)
LTC4267CGN#PBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
LTC4267CGN#TRPBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
LTC4267IDHC#PBF Material Declaration Reliability Data 16-Lead DFN (5mm x 3mm w/ EP)
LTC4267IDHC#TRPBF Material Declaration Reliability Data 16-Lead DFN (5mm x 3mm w/ EP)
LTC4267IGN#PBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
LTC4267IGN#TRPBF Material Declaration Reliability Data 16-Lead SSOP (Narrow 0.15 Inch)
Wafer Fabrication Data PoE Consortium Interoperability Report LTC4267

PCN-PDN Information

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Sample & Buy


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Price Table Help

 

Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.