LM5073MHX/NOPB

Overview

The LM5073MHX/NOPB is a Power over Ethernet (PoE) controller designed for IEEE 802.3af compliant Powered Devices. It integrates a DC/DC converter and operates within a supply voltage range of 9V to 70V, supporting a maximum power output of 12.95W. The device features an internal switch and is housed in a 14-HTSSOP package with exposed pad. It supports auxiliary power functionality and functions across an operating temperature range of -40°C to 125°C. The component draws a supply current of 2mA.

Feature Summary

• Integrates a complete PoE interface and DC/DC conversion stage for compact Powered Device designs
• Supports auxiliary power input to enhance system efficiency during low-load conditions
• Includes internal switching elements to minimize external component count

Applications

• IEEE 802.3af Powered Device implementations
• Industrial networking equipment requiring robust power management
• IoT gateways and sensors utilizing PoE connectivity

Procurement Notes

Verify the specific suffix 'MHX' against official Texas Instruments documentation, as primary records indicate the 'MH' variant. Confirm current manufacturing status, as related models may be obsolete. Ensure the selected package matches the 14-HTSSOP specification and validate RoHS compliance requirements for the target assembly process.

Selection Notes

Select this component for applications strictly adhering to the 802.3af standard. Evaluate thermal performance given the 12.95W maximum power rating within the HTSSOP package. Consider the 9V to 70V input range compatibility with the upstream PoE PSE. Verify that the auxiliary power feature aligns with the system's power architecture needs.

Part Context

This part belongs to the LM5073 family of PoE controllers from Texas Instruments. It serves as a specialized solution for integrating power delivery and regulation into networked devices. The component simplifies design by combining control logic with power conversion capabilities in a single integrated circuit.

Replacement Considerations

Public confirmed substitute part numbers are not available.