MP3924GU-Z

Overview

The MP3924GU-Z is a quad-port IEEE 802.3af/at Power Sourcing Equipment (PSE) controller manufactured by Monolithic Power Systems. It operates within a supply voltage range of 44V to 57V and supports four independent PoE channels. The device complies with both 802.3af and 802.3at standards, featuring an internal current limit of 17mA. Designed for robust industrial environments, it functions reliably between -40°C and +125°C junction temperature. Packaged in a compact 32-QFN (5x5mm) surface-mount format without integrated internal switches.

Feature Summary

• Supports quad-port architecture compliant with IEEE 802.3af and 802.3at standards
• Operates as a dedicated PSE controller without integrated internal power switches
• Provides reliable performance across extended industrial temperature ranges

Applications

• Quad-port Ethernet switch designs requiring integrated PoE control
• Industrial networking infrastructure utilizing IEEE 802.3af/at standards
• Power sourcing equipment for multi-port LAN applications

Procurement Notes

Verify the specific suffix 'GU' against official Monolithic Power Systems documentation to confirm package type and tape/reel specifications. Ensure compatibility with your PCB footprint for the 32-QFN (5x5mm) configuration. Cross-reference the RoHS status and environmental compliance declarations provided by the manufacturer prior to final procurement decisions.

Selection Notes

Select this component when designing systems requiring simultaneous management of four PoE ports under IEEE 802.3af/at protocols. It is suitable for applications needing external switch implementation rather than integrated solutions. Consider the 44V-57V input requirement and the absence of internal switches when planning the power stage design.

Part Context

This part belongs to the MP3924 family of PoE controllers from Monolithic Power Systems. It serves as a specialized interface for managing power delivery over Ethernet networks. The device integrates control logic necessary for port classification and power negotiation, distinguishing it from simple linear regulators or standalone switching converters.

Replacement Considerations

MP3924GU-P is listed as a direct substitute by the manufacturer.