LT4293IDD#PBF

Overview

The LT4293IDD#PBF is a single-channel Power over Ethernet (PoE) Powered Device (PD) interface controller compliant with IEEE 802.3af, 802.3at, and LTPoE++ standards. It integrates a hot-swap controller, power switch, and classification logic within a compact 10-lead DFN package. The device features a T2P output pin that distinguishes between LTPoE++ and standard IEEE protocols during negotiation, enabling accurate power availability assessment. Operating supply current is specified at 2 mA.

Feature Summary

• Supports LTPoE++ and IEEE 802.3af/at/bt PD interface control
• Integrates hot-swap controller and power switch in one IC
• T2P output enables protocol distinction and power negotiation

Applications

• LTPoE++ powered device systems
• IEEE 802.3af/at compliant PoE endpoints
• High-power LAN interface controllers

Procurement Notes

Verify the specific suffix (#PBF vs #TRPBF) to confirm tube versus tape-and-reel packaging requirements. Confirm the 10-DFN footprint matches your PCB layout. Ensure compatibility with your system's voltage levels and thermal management needs for the integrated power switch.

Selection Notes

Select this component when designing LTPoE++ or standard PoE+ powered devices requiring integrated hot-swap and classification. The 10-DFN package suits space-constrained designs. Verify support for the specific IEEE standard required by your application before finalizing the bill of materials.

Part Context

This part belongs to Analog Devices' family of PoE interface controllers. It serves as a bridge between the Ethernet physical layer and the local power distribution network, managing power delivery and protocol compliance for downstream circuitry.

Replacement Considerations

LT4294IDD#PBF is a related controller in the same family. Verify pinout and feature parity before substitution, as differences may exist in channel count or specific protocol support.