SI3406-A-GMR

Overview

The SI3406-A-GMR is a Power over Ethernet (PoE) Powered Device controller compliant with the IEEE 802.3at Type 2 standard. It integrates a high-voltage power switch and a non-isolated DC-DC converter to provide efficient power delivery for PoE applications. The device operates within a supply voltage range of 2.7 V to 57 V and supports current limiting at 10.5 mA. Designed for surface-mount installation, it functions reliably across an operating temperature range from -40 °C to +85 °C.

Feature Summary

• Integrates a high-voltage power switch with a non-isolated DC-DC converter for complete PoE PD interface solutions
• Complies with IEEE 802.3at Type 2 standards for powered device classification and detection
• Supports wide input voltage operation suitable for various PoE power sourcing equipment configurations

Applications

• IEEE 802.3at Type 2 Powered Device implementations
• Power management in LAN infrastructure components
• Non-isolated DC-DC conversion for PoE endpoints

Procurement Notes

Verify the specific suffix against official Skyworks documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with your PCB footprint and reflow profile requirements. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and revision levels before procurement.

Selection Notes

Select this component when designing systems requiring integrated PoE detection and non-isolated power conversion under the 802.3at standard. Consider the 57 V maximum operating voltage and thermal performance limits during layout. Verify that the required output current and efficiency meet the target application's power budget constraints.

Part Context

This component belongs to the Skyworks Si3406x series of Power over Ethernet controllers. It is designed to simplify PoE endpoint designs by combining detection, classification, and power conversion functions into a single integrated circuit, reducing the bill of materials and board space compared to discrete solutions.

Replacement Considerations

Consult official Skyworks substitution guides for verified alternatives. Do not assume functional equivalence with other PoE controllers without verifying pinout, electrical parameters, and protocol compliance.