Linear Technology LTC4267IGN-1 Power over Ethernet (PoE) Interface Controller

The LTC4267IGN-1 is a sophisticated Power over Ethernet (PoE) interface controller designed by Linear Technology, now part of Analog Devices, that facilitates the delivery of power over Ethernet cabling to powered devices (PDs). This integrated circuit is compliant with the IEEE 802.3af standard, ensuring compatibility with a wide range of PoE systems and devices.

The LTC4267IGN-1 features a high-performance switching regulator controller that can operate in both forward and flyback converter topologies. It is designed to provide a seamless and efficient power solution for devices such as IP phones, wireless network access points, and security cameras, which can benefit from the centralized power distribution that PoE offers.

One of the key advantages of the LTC4267IGN-1 is its integrated signature resistor, which allows for simplified PD detection by PoE power sourcing equipment (PSE). Additionally, it includes a programmable classification current source that enables the PD to inform the PSE of its power classification level during the negotiation phase. This ensures that the device only draws the necessary amount of power, promoting energy efficiency.

The IC also boasts comprehensive protection features, including over-current, under-voltage lockout, and thermal shutdown, to safeguard both the PD and the Ethernet network from potential damage. Its robust design ensures reliable operation even in challenging environments.

The LTC4267IGN-1 is available in a compact SSOP-16 package, making it suitable for space-constrained applications. Its wide operating temperature range ensures performance across various conditions, making it a versatile choice for designers looking to integrate PoE capabilities into their products.

With the LTC4267IGN-1, manufacturers can create PoE-enabled devices that are not only compliant with industry standards but also benefit from advanced features and protections that Linear Technology is known for. The result is a reliable, high-performance solution for modern networked devices requiring remote power delivery.