MP8004GQW-P

Overview

The MP8004GQW-P is a Powered Device (PD) interface and flyback DC/DC converter compliant with the IEEE 802.3af standard for Power over Ethernet applications. It integrates a power switch with a maximum on-resistance of 1.2 Ohms and an internal current limit of 420 mA. The device operates within a supply voltage range of 4.5 V to 6 V and supports a maximum duty cycle of 67.5%. Designed for robust performance, it functions across an extended temperature range from -40°C to +125°C. The component is housed in a 20-lead QFN package suitable for surface-mount installation.

Feature Summary

• Integrates IEEE 802.3af PD interface logic with a dedicated flyback DC/DC converter
• Includes internal power switching with defined current limiting capabilities
• Supports operation across industrial temperature ranges for reliable deployment

Applications

• Power over Ethernet powered devices requiring 802.3af compliance
• Network infrastructure equipment utilizing integrated PoE interfaces
• Embedded systems needing combined PD detection and isolated DC/DC conversion

Procurement Notes

Verify that the specific suffix 'P' aligns with your required reel packaging configuration, as alternative suffixes may indicate different tape-and-reel quantities or environmental certifications. Confirm that the 20-QFN footprint matches your PCB layout constraints. Ensure that the 420 mA current limit satisfies the downstream load requirements without triggering premature protection mechanisms during startup transients.

Selection Notes

Select this component when a single-chip solution combining PD classification and isolated power generation is necessary to reduce bill-of-materials complexity. Evaluate the 1.2 Ohm on-resistance against thermal dissipation limits in high-density layouts. Consider the 4.5 V to 6 V operating window to ensure compatibility with your system's auxiliary power rails if not solely dependent on the PoE line.

Part Context

This part belongs to the MP8004 series of Monolithic Power Systems, which focuses on simplified Power over Ethernet solutions. The series targets designers seeking to minimize external component counts by integrating both the interface controller and the power conversion stage into one package. This approach contrasts with discrete implementations that require separate controllers and magnetics.

Replacement Considerations

The MP8004GQW-Z is documented as a direct substitute for the MP8004GQW-P. Verify that the functional specifications remain identical between the two suffixes before swapping components in existing designs.