The LTC4269CDKD-2#TRPBF is a feature-rich Power over Ethernet (PoE) Powered Device (PD) interface controller designed by Linear Technology. It is specifically tailored to extract power from a conventional twisted pair Category 5 Ethernet cable, conforming to the IEEE 802.3at (PoE+) standard, as well as being backward compatible with IEEE 802.3af (PoE).

This advanced component integrates a PD interface with an efficient, synchronous, rectified, forward converter, making it a superb choice for PD applications that require a compact solution with high efficiency. The LTC4269CDKD-2#TRPBF operates over a wide input voltage range and supports a variety of output voltages, making it versatile for different PoE applications.

Key features of the LTC4269CDKD-2#TRPBF include:

• IEEE 802.3at (PoE+) and IEEE 802.3af (PoE) compliance
• Integrated synchronous rectified forward converter
• Support for high power applications up to 25.5W
• Wide input voltage range for versatile use cases
• Advanced protection features such as overvoltage, overcurrent, and thermal protection
• Low operating power dissipation
• Signature resistor and classification current source integrated
• Available in a compact, thermally enhanced 5x7mm QFN package

The LTC4269CDKD-2#TRPBF is designed with robustness in mind, featuring a range of protective measures to ensure reliable operation under various conditions. Its thermal performance is enhanced by the QFN package, which aids in heat dissipation for better overall performance.

Applications for this PoE PD interface controller span across VoIP phones, wireless network access points, security cameras, and other Ethernet-connected devices that benefit from being powered over the Ethernet cable, eliminating the need for separate power supplies and reducing installation complexity.

With the LTC4269CDKD-2#TRPBF, system designers can confidently develop PoE-enabled devices with the assurance of compliance to industry standards, efficiency in power conversion, and the reliability of a well-protected power solution.