LTC4279IS#PBF

Overview

The LTC4279IS#PBF is a single-port Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at Type 1, Type 2, and LTPoE++ compliant Power over Ethernet systems. It operates within a supply voltage range of 45V to 57V and is housed in a 16-lead SOIC package with an industrial temperature rating. The device features a quiescent current of 1.7 mA and supports Class 0 through Class 8 power classifications.

Feature Summary

• Autonomous operation for simplified PSE implementation requiring minimal passive components
• Supports multiple PoE standards including 802.3af, 802.3at, and LTPoE++
• Integrated protection mechanisms for port safety and system reliability

Applications

• IEEE 802.3af (PoE) powered devices
• IEEE 802.3at (PoE+) powered devices
• LTPoE++ high-power application implementations

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliance when sourcing. Confirm that the 16-SOIC package variant matches your PCB footprint requirements. Ensure the 45V to 57V input supply aligns with your system design before procurement.

Selection Notes

Select this component for single-port applications requiring support for legacy and high-power LTPoE++ standards. The SOIC-16 package offers a surface-mount solution suitable for space-constrained designs. Consider the 1.7 mA operating current for efficiency-sensitive power budgets.

Part Context

This part belongs to the LTC4279 series of autonomous PSE controllers from Analog Devices. It is distinct from other interface or multiplexer ICs in the portfolio, focusing specifically on Ethernet power delivery control and classification logic for network infrastructure.

Replacement Considerations

The DC2541A is a demonstration board utilizing the LTC4279 controller, not a direct functional replacement. No alternative part numbers are documented as direct substitutes in the provided data.