LTC4290CIUJ#PBF

Overview

The LTC4290CIUJ#PBF is an eight-channel Power Sourcing Equipment (PSE) controller compliant with IEEE 802.3af and 802.3at standards. It operates within a supply voltage range of 36V to 57V and supports up to 15.4W per port for PoE+ applications. The device integrates high-side power switches with a maximum on-resistance of 1.2 ohms, enabling efficient power delivery over Ethernet cabling. Designed for robust network infrastructure, it features comprehensive protection mechanisms including overcurrent, thermal, and short-circuit safeguards.

Feature Summary

• Supports simultaneous operation of eight independent PoE and PoE+ ports
• Integrates high-side power switches with low on-resistance characteristics
• Provides complete compliance with IEEE 802.3af and 802.3at standards

Applications

• Enterprise-grade network switches
• Wireless access point controllers
• Industrial Ethernet gateways

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout compatibility and electrical specifications. Ensure that the QFN-40 package variant matches the target PCB footprint requirements. Cross-reference the RoHS status and environmental compliance data directly from the manufacturer's datasheet before finalizing procurement orders.

Selection Notes

Select this component for designs requiring multi-port PoE aggregation without external switch matrices. Evaluate thermal dissipation capabilities based on the QFN-40 package constraints and ambient operating conditions. Confirm that the input voltage range aligns with the system's power distribution architecture and that the control interface meets the host processor's signaling requirements.

Part Context

This part belongs to the LTC4290 family of PSE controllers designed for high-density power distribution in networking equipment. It serves as a central management unit for powering remote devices via standard Ethernet cables. The integrated architecture reduces bill-of-materials count by combining control logic and power switching into a single compact solution.

Replacement Considerations

LTC4290AIUJ#PBF offers LTPoE++ support; LTC4290BIUJ#PBF provides enhanced PoE+ performance.