Linear Technology LTC4267IGN#PBF Power over Ethernet (PoE) Interface Controller

The LTC4267IGN#PBF is a highly integrated Power over Ethernet (PoE) interface controller designed by Linear Technology, a leader in analog and mixed-signal semiconductor products. This advanced component is specifically engineered to simplify the implementation of Power over Ethernet in Powered Devices (PDs), such as VoIP phones, wireless access points, and network cameras. The LTC4267IGN#PBF combines a PD interface with a current-mode switching regulator, making it a compact and efficient solution for PoE applications.

Key Features:

• IEEE 802.3af Compliant: The LTC4267IGN#PBF adheres to the IEEE 802.3af standard for PoE, ensuring compatibility with other compliant devices in the network.
• Integrated Switching Regulator: It includes an onboard switching regulator that operates over a wide input voltage range, providing a flexible and efficient power supply solution.
• Signature Resistor Detection: The device features an integrated signature resistor, which allows Power Sourcing Equipment (PSE) to detect the presence of a compliant PD.
• Programmable Classification: It supports programmable class detection, enabling the PD to communicate its power requirements to the PSE.
• High Surge Protection: The LTC4267IGN#PBF is designed to handle high surge events, providing robust protection for the powered device.
• Thermal Shutdown: A built-in thermal shutdown feature ensures the device operates within safe temperature limits.

Applications:

• VoIP Phones
• Wireless Access Points
• Network Cameras
• Other Ethernet-powered devices

The LTC4267IGN#PBF is packaged in a narrow SSOP-24, which is suitable for space-constrained applications. Its integration of a PD interface and switching regulator into a single chip allows for a reduced component count, lower system cost, and improved reliability. The device's advanced features, such as programmable classification and thermal shutdown, make it a versatile and essential component for any PoE-enabled system.

Whether you are designing new PoE systems or upgrading existing infrastructure, the LTC4267IGN#PBF from Linear Technology provides a high-performance, efficient, and compliant solution for your power delivery needs.