LM5070MTC-50

Overview

The LM5070MTC-50 is an integrated Power Over Ethernet (PoE) Powered Device (PD) interface and PWM controller compliant with IEEE 802.3af standards. It operates within a supply voltage range of 1.8 V to 75 V and supports a maximum output power of 12.95 W. The device features a current limit of 390 mA and a maximum on-resistance of 2.2 Ohms. Designed for surface-mount installation in a TSSOP-16 package, it functions reliably across an operating temperature range from -40°C to +125°C.

Feature Summary

• Integrates PoE PD interface logic with a current-mode DC-DC PWM controller
• Supports user-programmable under-voltage threshold and hysteresis settings
• Includes a dedicated fault current control loop for protection

Applications

• IEEE 802.3af compliant powered network devices
• Power management for LAN-connected sensors
• Integrated interfaces for low-power IoT endpoints

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package and thermal specifications. Check for obsolescence status as availability may be limited. Ensure compliance with RoHS directives if required by the target application environment.

Selection Notes

Select this component for applications requiring a single-chip solution for both PoE detection and DC-DC conversion. Consider the TSSOP-16 package constraints for PCB layout. Evaluate the 390 mA current limit against peak load requirements. Verify that the 802.3af standard aligns with the system's power budget needs.

Part Context

This part belongs to the LM5070 series, which provides integrated solutions for Power Over Ethernet applications. The series combines interface control with switching regulation to simplify design complexity. It serves as a foundational component for building efficient and compact powered devices in network infrastructure.

Replacement Considerations

LM5070MTC-50/NOPB is a verified equivalent variant within the same family.