LTC4290AIUJ#PBF

Overview

The LTC4290AIUJ#PBF is an eight-channel Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at Type 1 and Type 2 applications, supporting PoE+ and LTPoE++ standards. It delivers up to 90W per port with a maximum input voltage of 60V. The device features integrated high-side power switches, class detection, and monitoring functions including VEE and VPORT sensing. It utilizes a 0.25-ohm sense resistance per channel and provides one-second rolling IPORT averaging for accurate current measurement within a -40°C to +85°C operating temperature range.

Feature Summary

• Supports IEEE 802.3at Type 1 and Type 2 PSE standards with LTPoE++ compatibility
• Integrates eight independent high-side power switches with class detection logic
• Provides comprehensive port monitoring including VEE, VPORT, and averaged IPORT sensing

Applications

• PoE PSE switches and routers
• PoE midspan injectors
• High-power network infrastructure equipment

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and reel configuration. The '#PBF' designation indicates lead-free termination and RoHS compliance. Confirm availability status as supply constraints may apply. Ensure the component matches the required thermal performance specifications for the intended application environment.

Selection Notes

Select this component for designs requiring multi-port PoE+ or LTPoE++ power delivery. It is suitable for systems needing integrated switch control and precise current monitoring without external discrete components. Consider the 40-QFN package dimensions for PCB layout constraints. Verify that the 60V input rating aligns with the system's power supply architecture.

Part Context

This part belongs to Analog Devices' portfolio of Power Over Ethernet controllers. It is engineered for high-density network equipment where space efficiency and power management are critical. The device simplifies design by integrating multiple PSE functions into a single IC, reducing bill of materials complexity compared to discrete solutions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult official manufacturer resources for cross-reference data.