LTC4267
PRODUCTIONPower over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator
- Part Models
- 8
- 1ku List Price
- Starting From $2.75
Overview
- 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
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
Documentation
Data Sheet 1
User Guide 4
Design Note 1
Technical Articles 2
Video 1
Product Selector Card 3
Press Release 1
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 |
|---|---|---|---|
| LTC4267CDHC#PBF | 16-Lead DFN (5mm x 3mm w/ EP) | ||
| LTC4267CDHC#TRPBF | 16-Lead DFN (5mm x 3mm w/ EP) | ||
| LTC4267CGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC4267CGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC4267IDHC#PBF | 16-Lead DFN (5mm x 3mm w/ EP) | ||
| LTC4267IDHC#TRPBF | 16-Lead DFN (5mm x 3mm w/ EP) | ||
| LTC4267IGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC4267IGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| LTC4267CGN#PBF | PRODUCTION | |
| LTC4267CGN#TRPBF | PRODUCTION | |
| LTC4267IGN#PBF | PRODUCTION | |
| LTC4267IGN#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG] |
||
| LTC4267CGN#PBF | PRODUCTION | |
| LTC4267CGN#TRPBF | PRODUCTION | |
| LTC4267IGN#PBF | PRODUCTION | |
| LTC4267IGN#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Circuit Monitors 1 | ||
| LT2940 | PRODUCTION | Power and Current Monitor |
| Power-over-Ethernet (PoE) Controllers 1 | ||
| LT4275 | PRODUCTION | LTPoE++/PoE+/PoE PD Controller |
| Parts | Product Life Cycle | Description |
|---|---|---|
| LTC4267-1 | PRODUCTION | Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4267
- LTC4267-1
- LTC4267-3
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.
