The LTC4266AIUHF-4#PBF is a cutting-edge Power over Ethernet (PoE) controller integrated circuit from Linear Technology, now part of Analog Devices. This advanced product is designed to facilitate the delivery of power over Ethernet cabling to powered devices (PDs), such as Voice over IP phones, wireless access points, and network cameras.

Key Features

• IEEE 802.3at Compliant: The LTC4266AIUHF-4#PBF adheres to the IEEE 802.3at standard, also known as PoE+, allowing it to deliver up to 25.5W of power per port, ensuring compatibility with a wide range of high-power devices.
• Quad-Channel System: This component is capable of controlling up to four PoE ports, making it an ideal choice for small to mid-sized network applications.
• Advanced Power Management: The LTC4266AIUHF-4#PBF features sophisticated power management capabilities, including programmable classification, inrush current control, and per-port power-up prioritization to ensure reliable operation.
• High Efficiency: Designed for efficiency, it minimizes power loss and heat generation, which is crucial for maintaining the longevity and reliability of network equipment.
• Robust Protection Features: The product includes multiple protection features such as overcurrent protection, thermal shutdown, and fault detection to safeguard the PoE system from electrical anomalies.

Applications

The LTC4266AIUHF-4#PBF is suitable for a variety of applications where PoE is required. It is commonly used in:

• Enterprise networking equipment such as switches and routers
• Industrial automation systems
• Remote monitoring and security systems
• Point of Sale (PoS) terminals and kiosks

Technical Specifications

Operating within an industrial temperature range, the LTC4266AIUHF-4#PBF is provided in a QFN-38 package. It requires a supply voltage typically ranging from 44V to 57V to accommodate the PoE+ standard voltage range. Moreover, it integrates a 1MHz switching frequency, which helps in optimizing the size of external components, thus reducing the overall footprint on the printed circuit board (PCB).

Conclusion

The LTC4266AIUHF-4#PBF from Linear Technology is a robust and efficient solution for implementing PoE capabilities in networking and communication devices. With its compliance to the IEEE 802.3at standard and multiple channel support, it is a versatile and reliable choice for designers looking to enhance their network infrastructure.