LM5070MTCX-80/NOPB

Overview

The LM5070MTCX-80/NOPB is a quad Power-over-Ethernet controller compliant with the IEEE 802.3af standard, designed for use in Powered Device (PD) applications. It integrates a current-mode DC-DC controller and operates within a supply voltage range of 1.8 V to 75 V. The device supports a maximum duty cycle of 80% and features an internal switch with a maximum on-resistance of 2.2 Ohms. It provides a current limit of 390 mA and delivers up to 12.95 W of output power. Operating temperatures span from -40°C to +125°C, and it is housed in a 16-pin TSSOP package.

Feature Summary

• Integrates a current-mode DC-DC controller with user-programmable under-voltage threshold and hysteresis capabilities.
• Includes a dedicated fault current control loop for enhanced protection and reliability.
• Complies with IEEE 802.3af standards for Power-over-Ethernet powered devices.

Applications

• IEEE 802.3af compliant Powered Devices
• Power-over-Ethernet interface circuits
• LAN powered equipment

Procurement Notes

Verify component authenticity through authorized Texas Instruments channels or certified distributors. Confirm the specific suffix matches the required tape-and-reel packaging variant. Check for recent Product Change Notifications regarding material or process updates. Ensure design compatibility with the specified 16-TSSOP footprint and thermal requirements.

Selection Notes

Select this component for designs requiring integrated PoE PD functionality with built-in DC-DC regulation. Consider the 1.8 V to 75 V input range for flexible power sourcing. Evaluate the 16-TSSOP package for space constraints. Verify that the 390 mA current limit meets the downstream load requirements without external limiting components.

Part Context

This part belongs to the LM5070 family of quad PoE controllers. It shares functional similarities with other industry devices like the MAX5945 and LTC4267 but offers integrated switching regulation. The 'MTC' designation indicates the TSSOP-16 package, while '80' denotes the 802.3af compliance level.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Texas Instruments resources for qualified alternatives or cross-reference with similar IEEE 802.3af PD controllers if this specific variant is unavailable.

FAQ

What type of controller does the LM5070MTCX-80/NOPB integrate?

It integrates a current-mode DC-DC controller along with PoE interface logic.

Does the device support programmable thresholds?

Yes, it features user-programmable under-voltage threshold and hysteresis settings.