LTC4267IGN - Power over Ethernet (PoE) Interface Controller

The LTC4267IGN is a sophisticated integrated circuit from Linear Technology, designed to facilitate Power over Ethernet (PoE) applications in accordance with the IEEE 802.3af standard. This controller is a crucial component for PoE systems, as it enables the safe transfer of electrical power, along with data, to remote devices over standard Ethernet cables. The LTC4267IGN specifically caters to powered device (PD) applications, making it an ideal choice for network cameras, wireless access points, and other Ethernet-connected devices that require power alongside data connectivity.

Key Features:

• IEEE 802.3af Compliant: The LTC4267IGN meets the stringent requirements of the IEEE 802.3af standard, ensuring compatibility with other compliant devices in a PoE ecosystem.
• Integrated Switching Regulator: This controller comes with an onboard switching regulator that provides a highly efficient power conversion process, minimizing heat generation and enhancing overall system reliability.
• Signature Resistor Detection: It includes an integrated signature resistor, which allows the PoE power sourcing equipment (PSE) to detect the presence of a compliant PD, ensuring safe power allocation.
• Advanced Power Management: The LTC4267IGN features programmable classification, undercurrent and overload protection, and a power good output, delivering sophisticated control over the power supply process.
• Thermal Protection: The device is equipped with thermal shutdown capabilities, protecting both the IC and the connected equipment from potential damage due to overheating.
• Compact Design: Housed in a 24-pin SSOP package, the LTC4267IGN is designed to occupy minimal space on a printed circuit board, making it suitable for compact PD designs.

Applications:

The LTC4267IGN is versatile and can be used in various applications where PoE is required. Some common applications include:

• VoIP Phones
• IP Security Cameras
• Wireless Network Access Points
• Network Routers and Switches
• Remote Monitoring Systems

In summary, the LTC4267IGN from Linear Technology is a comprehensive solution for PDs in a PoE system. It ensures safe power delivery, efficient power management, and a compact footprint, making it an excellent choice for designers looking to integrate PoE capabilities into their products.