LTC4265
PRODUCTIONIEEE 802.3 at High Power PD Interface Controller with 2-Event Classification Recognition
- Part Models
- 4
- 1ku List Price
- Starting From $1.94
Overview
- IEEE 802.3af/at Powered Device (PD) Controller
- IEEE 802.3at 2-event Classification Signaling
- Programmable Classification Current
- Flexible Auxiliary Power Support Using SHDN Pin
- Rugged 100V Onboard MOSFET with 100mA Inrush Current Limit.
- Complementary Power Good Outputs
- Onboard Signature Resistor
- Comprehensive Thermal Protection
- Undervoltage and Overvoltage Lockout
- 12-Lead, 4mm × 3mm DFN Package
The LTC4265 is a 3rd generation Powered Device (PD) Interface controller intended for IEEE 802.3at high power Power-over-Ethernet (PoE) applications up to 25.5W. By supporting 1-event and 2-event classification signaling as defined by IEEE 802.3, the LTC4265 can be used in a wide range of product configurations. A 100V MOSFET isolates the DC/DC converter during detection and classification, and provides 100mA inrush current for a smooth power-up transition. The LTC4265 also includes complementary power good outputs, an on-board signature resistor, undervoltage/overvoltage lockout and comprehensive thermal protection. All PD solutions from ADI include a shutdown pin with signature corrupt to provide flexible auxiliary power options.
The LTC4265 PD interface controller can be used along with a variety of DC/DC converter products to provide a complete, cost effective power solution for high power PD applications.
The LTC4265 is available in the space-saving low profile (4mm × 3mm) DFN package and is drop-in compatible with the LTC4264.
Applications
- 802.11n Access Points
- High Power VoIP Video Phones
- RFID Reader Systems
- PTZ Security Cameras and Surveillance Equipment
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Video 1
Product Selector Card 3
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC4265CDE#PBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC4265CDE#TRPBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC4265IDE#PBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC4265IDE#TRPBF | 12-Lead DFN (4mm x 3mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4265
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.
Evaluation Kits
LTC4265 IEEE802.3 at PD Controller