LTC4279IUFD

Overview

The LTC4279IUFD is a single-channel Power Sourcing Equipment (PSE) controller manufactured by Analog Devices Inc. It supports IEEE 802.3af, 802.3at, and LTPoE++ standards for Ethernet-powered devices. The component is housed in a 20-lead QFN package measuring 4x5 mm. It integrates power switch control and management functions required for compliant PoE applications.

Feature Summary

• Supports multiple PoE standards including 802.3af, 802.3at, and LTPoE++
• Integrates single-channel PSE power management capabilities
• Designed for compact surface-mount implementation

Applications

• IEEE 802.3af compliant PoE systems
• IEEE 802.3at compliant PoE+ systems
• LTPoE++ powered device infrastructure

Procurement Notes

Verify the specific suffix against official documentation to confirm pinout and thermal characteristics. Ensure compatibility with the target IEEE standard before integration. Confirm package dimensions match the PCB footprint design requirements.

Selection Notes

Select this component for single-port PoE applications requiring support for legacy and high-power standards. Consider the 20-QFN package size for space-constrained designs. Verify thermal performance requirements against the datasheet specifications.

Part Context

This part belongs to the LTC4279 family of PoE controllers from Analog Devices. It serves as a core component for implementing power sourcing equipment in network infrastructure. The family includes variants such as the IS version in SOIC packages.

Replacement Considerations

The LTC4279IS#PBF is a documented alternative in a 16-SOIC package. Verify package compatibility and pin mapping before substitution.