LTC4263IDE-1#PBF

Overview

The LTC4263IDE-1#PBF is a Power Sourcing Equipment (PSE) controller with an integrated power switch, designed for IEEE 802.3af compliant PoE applications. It operates within a supply voltage range of 33 V to 66 V and features a maximum on-resistance of 3 Ohms. The device limits current to 425 mA and draws 2 mA of operating supply current. It functions reliably between 0°C and +70°C in a DFN-14 surface-mount package.

Feature Summary

• Integrates PSE control logic with a high-power single-channel switch
• Complies with IEEE 802.3af standards for powered devices
• Supports hot-swap insertion without external components

Applications

• IEEE 802.3af Power over Ethernet controllers
• High-power LAN port implementations
• Network infrastructure power sourcing equipment

Procurement Notes

Verify the specific suffix #PBF indicates tube packaging versus #TRPBF for reel packaging when ordering. Confirm availability status as restricted or limited supply may apply. Ensure the industrial temperature grade matches system requirements. Validate RoHS compliance documentation prior to final procurement decisions.

Selection Notes

Select this component for single-port 802.3af designs requiring integrated switching. Compare against the commercial grade variant if extended temperature ranges are unnecessary. Verify pinout compatibility with existing PCB layouts. Consider the DFN-14 footprint constraints during mechanical design.

Part Context

This part belongs to the LTC4263-1 series of PoE controllers. It serves as a compact solution for powering end devices via Ethernet cables. The integrated switch reduces bill-of-materials count compared to discrete solutions. It targets cost-sensitive network hardware requiring reliable power delivery.

Replacement Considerations

LTC4263CDE-1#PBF offers identical functionality in the commercial temperature range.