LTC4271IUF#PBF

Overview

The LTC4271IUF#PBF is a Power Sourcing Equipment (PSE) controller compliant with the IEEE 802.3at (PoE+) standard, manufactured by Analog Devices Inc. It operates on a single 3V to 3.6V supply voltage with a typical supply current of 10mA. The device is housed in a 24-lead WQFN package measuring 4mm x 4mm with an exposed pad. It supports operation across an industrial temperature range from -40°C to +85°C and is RoHS compliant.

Feature Summary

• Complies with IEEE 802.3at PoE+ standards for power sourcing equipment
• Integrates digital control logic for port management and classification
• Supports hot-swappable connections for safe insertion and removal
• Features low supply current consumption for efficient system operation

Applications

• IEEE 802.3at compliant Power over Ethernet switches
• Midspan power injection devices for network infrastructure
• Access point power distribution systems
• Industrial networking equipment requiring PoE+

Procurement Notes

Verify the specific suffix '#PBF' indicates lead-free tape-and-reel or tube packaging as per manufacturer documentation. Confirm the component status remains active before procurement. Ensure compatibility with existing PCB footprints for the 24-WFQFN package. Check for any recent PCN updates regarding assembly or material changes.

Selection Notes

Select this controller when designing systems requiring strict adherence to IEEE 802.3at specifications. It is suitable for applications needing integrated PSE functionality without external complex discrete components. Consider the 24-QFN package size for space-constrained designs. Verify thermal performance requirements against the package's dissipation capabilities.

Part Context

This component belongs to the LTC427x family of PoE controllers from Analog Devices. It complements other models like the LTC4270 and LTC4291 within the company's portfolio. The series focuses on providing robust, standards-compliant power delivery solutions for Ethernet-based networks.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source data.