Product Overview: LTC4267CGN-3#PBF

The LTC4267CGN-3#PBF is a sophisticated integrated circuit from Linear Technology, designed to simplify the implementation of Power over Ethernet (PoE) functionality. This high-performance component is specifically created to work within IEEE 802.3af compliant systems, delivering power to remote devices over Ethernet cabling. It integrates a PD (Powered Device) interface along with a current-mode switching regulator, making it an ideal solution for networked devices requiring a compact power management system.

Key Features

• IEEE 802.3af Compliant: The LTC4267CGN-3#PBF adheres to the stringent specifications of the IEEE 802.3af standard, ensuring compatibility with other compliant devices and systems.
• Integrated Switching Regulator: This component includes an onboard switching regulator that operates in a current mode for improved noise immunity and easier filtering.
• Signature Resistor Detection: It features a built-in signature resistor, which allows PoE power sourcing equipment to detect the presence of a compliant device.
• Programmable Classification: The LTC4267CGN-3#PBF supports programmable class assignments for power level indication, which helps in power management and system organization.
• Thermal Protection: Enhanced thermal protection mechanisms are included to prevent overheating and damage under high power operation conditions.

Applications

This product is suitable for a wide range of applications where PoE is beneficial, including but not limited to:

• VoIP Phones
• Wireless Network Access Points
• Security Cameras
• Network Routers and Switches

Product Specifications

The LTC4267CGN-3#PBF is packaged in a compact 24-pin SSOP package, which allows for a small footprint on the PCB. It operates over the industrial temperature range, ensuring reliability in various environments. The device also supports auxiliary power input, enabling flexibility in power source options.

Conclusion

With its robust feature set and compliance with the IEEE 802.3af standard, the LTC4267CGN-3#PBF from Linear Technology is an excellent choice for designers looking to integrate PoE capabilities into their products. Its integration of key functions into a single chip simplifies design, reduces board space, and enhances system reliability.