The LT4275AIDD#PBF is a robust and efficient Power over Ethernet (PoE) interface controller designed by Linear Technology. This innovative component is engineered to simplify the implementation of Power over Ethernet functionality in a wide array of applications. It is a critical element for network devices such as wireless access points, security cameras, and VoIP phones that require power and data over a single Ethernet cable.

Key Features

• IEEE 802.3af/at Compliant: The LT4275AIDD#PBF adheres to the IEEE 802.3af/at specifications, ensuring compatibility with standard PoE equipment.
• Advanced LTPoE++ Support: It also supports Linear Technology's proprietary LTPoE++ standard for up to 90W of power delivery, providing greater flexibility for high-power applications.
• Integrated Hot Swap Controller: The device includes a built-in hot swap controller, which helps to prevent damage to the power device during insertion or removal.
• Signature Resistor Detection: It features a signature resistor detection mechanism that facilitates the identification of PoE-capable devices, ensuring safe and reliable power allocation.
• Classification Current Event Detection: The controller can detect classification current events, which plays a crucial role in determining the power classification of connected devices.

Performance and Protection

The LT4275AIDD#PBF is designed for high performance and protection. It incorporates a robust 100V MOSFET to ensure reliable operation under varying conditions. Over-temperature protection, over-current protection, and under-voltage lockout are all built-in features that contribute to the longevity and reliability of the product.

Applications

Suitable for a variety of applications, the LT4275AIDD#PBF is an excellent choice for network equipment that requires dependable PoE capabilities. It is particularly well-suited for:

• Wireless Access Points (WAPs)
• Security Cameras and Surveillance Systems
• VoIP Phones
• Point of Sale (POS) Systems
• Network Routers and Switches

Package and Quality

The LT4275AIDD#PBF is offered in a compact 12-lead DFN package, enabling it to fit into space-constrained designs while maintaining a low thermal footprint. Linear Technology's commitment to quality ensures that this product meets the highest standards for performance and reliability.