Product Overview: LTC4263CDE-1

The LTC4263CDE-1 from Linear Technology is a sophisticated single-channel Power over Ethernet (PoE) interface controller designed for managing power delivery over Ethernet cabling. This component is ideal for applications requiring remote power for devices such as IP phones, wireless access points, and security cameras.

Key Features

• IEEE 802.3af Compliant: The LTC4263CDE-1 adheres to the IEEE 802.3af standard for PoE, ensuring compatibility with other compliant devices and systems.
• Integrated Switching Regulator: It features an onboard switching regulator that delivers a high-efficiency power conversion, which is crucial for maintaining the integrity of power delivery over long cable runs.
• Advanced Protection: The device includes a range of protection features such as overcurrent protection, thermal limiting, and under/overvoltage lockout, safeguarding both the power sourcing equipment and the powered device.
• Signature Resistor Detection: It automatically detects the signature resistance of a connected powered device (PD), ensuring that power is only applied to devices that indicate they are PoE capable.
• Compact Design: Housed in a small 12mm x 12mm DFN package, the LTC4263CDE-1 is designed for space-constrained applications.

Applications

The versatility of the LTC4263CDE-1 allows it to be used in a wide range of applications. It's particularly well-suited for:

• VoIP Phones
• Wireless Network Access Points
• Network Cameras and Security Systems
• Industrial Controls
• Remote Sensors and Monitoring Equipment

Technical Specifications

The LTC4263CDE-1 operates with a supply voltage range of 44V to 57V, typical of PoE applications. It features a programmable classification current to indicate the power classification of the PD to the PoE power sourcing equipment (PSE). The device is specified over the commercial temperature range of 0°C to 70°C, making it suitable for indoor environments.

Conclusion

Linear Technology's LTC4263CDE-1 is a robust and reliable solution for PoE applications, providing both power and data over a single Ethernet cable. Its compact form factor, compliance with IEEE standards, and integrated safety features make it an excellent choice for designers looking to incorporate PoE capabilities into their products.