LM5071MTX-50

Overview

The LM5071MTX-50 is a Power Over Ethernet (PoE) Powered Device (PD) controller manufactured by Texas Instruments. It integrates an 80V, 1Ω, 400mA internal MOSFET for power interface management. The device supports auxiliary power interfaces and includes detection resistor disconnect functionality. It operates within a temperature range of -40°C to 125°C and delivers a maximum power output of 12.95W. The component is housed in a 16-TSSOP package with a width of 4.40mm.

Feature Summary

• Integrates an 80V, 1Ω, 400mA internal MOSFET for efficient power handling
• Supports auxiliary power interfaces alongside standard PoE operation
• Includes detection resistor disconnect function for enhanced safety

Applications

• Power Over Ethernet Powered Devices compliant with IEEE 802.3af
• DC-DC converter control systems requiring integrated switching
• Network equipment powered via Ethernet cabling

Procurement Notes

Verify the specific suffix (e.g., MTX-50 vs NOPB) against the manufacturer's current ordering guide to ensure correct packaging and material specifications. Confirm RoHS compliance status directly from the latest datasheet or official distributor documentation before procurement. Cross-reference the part number with the most recent Product Change Notification (PCN) documents to account for any assembly material updates or qualification changes issued by Texas Instruments.

Selection Notes

Select this controller for designs requiring a compact solution that combines PoE PD interface logic with high-voltage internal switching capabilities. The integrated MOSFET reduces external component count compared to discrete solutions. Ensure the application voltage does not exceed the 80V rating. Verify compatibility with the intended DC-DC converter topology and confirm that the 12.95W power limit meets the system requirements.

Part Context

This component belongs to the LM5071 family of PoE controllers designed for reliable power delivery over Ethernet networks. It serves as a key interface between the network cable and the local DC power bus. The device simplifies design by integrating protection and control functions typically found in separate components, facilitating robust implementation in space-constrained networking hardware.

Replacement Considerations

Consult the official Texas Instruments product selection guide for verified cross-references. The LM5071MTX-50/NOPB variant shares identical electrical characteristics but may differ in packaging or environmental compliance details. Do not substitute with generic PoE controllers without verifying pinout compatibility and internal MOSFET ratings.