LM5070MTC-80

Overview

The LM5070MTC-80 is a quad power-over-Ethernet controller compliant with the IEEE 802.3af standard, designed for Powered Device applications. It integrates a current-mode DC-DC controller and features user-programmable under-voltage threshold and hysteresis alongside a fault current control loop. The device operates within a supply voltage range of 1.8 V to 75 V and supports a maximum duty cycle of 80%. Key electrical specifications include a maximum on-resistance of 2.2 Ohms, a current limit of 390 mA, and an output power capacity of 12.95 W. It functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a current-mode DC-DC controller with programmable under-voltage thresholds and hysteresis
• Includes a dedicated fault current control loop for enhanced protection
• Compliant with IEEE 802.3af standards for Powered Device implementations

Applications

• IEEE 802.3af compliant Powered Device (PD) systems
• Power Over Ethernet interface designs
• LAN powered equipment requiring integrated DC-DC control

Procurement Notes

Verify component authenticity through authorized channels as this part number is listed as obsolete by the manufacturer. Confirm specific lot codes and date codes against current inventory sources to ensure compatibility with existing production schedules. Request detailed datasheets and qualification documents directly from suppliers to validate technical specifications before integration into final designs.

Selection Notes

Select this component for applications requiring strict adherence to IEEE 802.3af standards with integrated power switching capabilities. Consider the TSSOP-16 package constraints and thermal management requirements for the specified operating temperature range. Evaluate the 390 mA current limit and 2.2 Ohm on-resistance against load requirements to ensure efficient power delivery within the 1.8 V to 75 V input window.

Part Context

The LM5070 series represents Texas Instruments' solution for Power Over Ethernet interfaces, combining control logic with power switching functions. This specific variant targets Powered Device roles in network infrastructure. It belongs to a family of controllers that simplify PD design by integrating essential protection and regulation features, reducing external component count compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The LM5070MTC-80 is listed as obsolete; consider consulting official replacement guides or contacting the manufacturer for end-of-life alternatives.