LTC4267IGN#PBF

Overview

The LTC4267IGN#PBF is a Powered Device (PD) controller and power switch IC designed for IEEE 802.3af Power over Ethernet applications. It integrates a low on-resistance power switch, current limit control, and classification logic to manage power delivery from a PSE. The device operates with a supply voltage range of -57 V to -44 V and supports an input voltage range of -57 V to -44 V. It features a 16-lead SSOP package and is rated for operation within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a low on-resistance power switch for efficient power delivery in PoE systems
• Includes built-in classification logic to negotiate power levels with the Power Sourcing Equipment
• Provides comprehensive protection against over-current, over-temperature, and reverse polarity conditions

Applications

• IEEE 802.3af compliant Powered Devices
• Power over Ethernet endpoint integration
• Network interface power management circuits

Procurement Notes

Verify the specific suffix '#PBF' indicates lead-free RoHS compliance when sourcing. Confirm the SSOP-16 package availability matches your PCB footprint requirements. Ensure the operating voltage range aligns with your system's PoE infrastructure specifications before procurement.

Selection Notes

Select this component for designs requiring integrated PoE PD functionality without external switches. It is suitable for applications needing strict adherence to IEEE 802.3af standards. Consider the thermal performance of the SSOP package for high-power density layouts.

Part Context

This part belongs to the LTC4267 family of PoE controllers. It serves as a core component for powering network devices via Ethernet cables. Analog Devices provides evaluation boards such as DC804B-A and DC859A for testing this controller's performance in typical PoE environments.

Replacement Considerations

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