LTC4267CGN#PBF - Power Over Ethernet (PoE) Interface Controller

The LTC4267CGN#PBF is a sophisticated integrated circuit from Linear Technology, designed to simplify the implementation of Power over Ethernet (PoE) functionality in networked devices. This controller is compliant with the IEEE 802.3af standard, which ensures interoperability with other compliant devices in PoE systems, providing a seamless and reliable power solution for devices such as IP cameras, wireless access points, and VoIP phones.

This product features a high-performance switching regulator that operates over a wide input voltage range, making it suitable for a variety of PoE applications. Its integrated power device and signature resistor allow for a compact design, reducing the overall footprint of the end product. The LTC4267CGN#PBF offers a complete solution for PD (Powered Device) applications, integrating the necessary control functions to manage the power extraction from the PoE power supply equipment (PSE).

The LTC4267CGN#PBF is designed with protection in mind, featuring overcurrent and thermal protection to ensure reliable operation under a range of fault conditions. It also includes classification circuitry that communicates power requirements to the PSE, as well as an inrush current limiter to prevent damage upon initial power-up.

Manufactured in a 24-pin SSOP package, the LTC4267CGN#PBF is designed to operate in the industrial temperature range of -40°C to 85°C, making it suitable for use in harsh environments. Its robust design and comprehensive feature set make it an ideal choice for developers looking to integrate PoE capabilities into their products with minimal additional circuitry and complexity.

Key features of the LTC4267CGN#PBF include:

• IEEE 802.3af compliant interface controller
• Integrated switching regulator for efficient power conversion
• Signature resistor and classification circuitry
• Overcurrent and thermal protection for enhanced reliability
• Inrush current limit and automatic power-up reset
• Operates over a wide input voltage range
• Industrial temperature range: -40°C to 85°C

The LTC4267CGN#PBF is a robust and reliable solution for designers looking to incorporate PoE capabilities into their networked devices, offering ease of use, efficiency, and protection in a single integrated package.