SI3454-B04-IM

Overview

The SI3454-B04-IM is a four-channel Power Sourcing Equipment (PSE) controller IC designed for IEEE 802.3at PoE applications. It operates within a supply voltage range of 44V to 57V and draws a typical supply current of 18mA. The device supports surface mount installation in a 38-VFQFN package with an exposed pad. It functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates four independent channels for simultaneous power delivery over Ethernet
• Complies with IEEE 802.3at standards for Class 4 power sourcing equipment
• Supports standard PoE classification and detection protocols

Applications

• Four-port PoE switch designs
• Power-over-Ethernet midspan injectors
• Network infrastructure equipment requiring multi-port power distribution

Procurement Notes

Verify the specific suffix IM against the manufacturer's latest documentation to confirm package type and tape-and-reel specifications. Confirm that the component status remains active for new designs, as older revisions may carry different lifecycle statuses. Ensure compatibility with the intended PCB footprint for the 38-VFQFN package.

Selection Notes

Select this component when a compact solution for four-channel PoE+ power sourcing is required. The integrated nature reduces external component count compared to discrete solutions. Verify that the 44V to 57V input range aligns with the upstream power supply architecture and that the thermal performance of the VFQFN package suits the enclosure constraints.

Part Context

Skyworks Solutions manufactures the SI3454 series as part of its Power Management portfolio. This specific model targets the growing demand for efficient PoE distribution in enterprise networking and IoT infrastructure. It complements other Skyworks components by providing standardized compliance for powered devices connected via Ethernet cabling.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer directly for qualified alternatives or updated design-in recommendations.