LM5071MT-80 Equivalent & Substitute Parts

Part Overview

The LM5071MT-80 is a Power Over Ethernet (PoE) Controller designed for single-channel 802.3af applications. This integrated circuit manages power delivery in PoE systems, operating across a wide supply voltage range of 1.8V to 60V with a maximum power output of 12.95W. The device features internal switching capability and auxiliary sense functionality, making it suitable for Power Delivery (PD) and DC/DC conversion applications.

The LM5071MT-80 is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure project timelines are not compromised due to component unavailability.

Substiute Parts

LM5071MT-80

Texas InstrumentsIn Stock: 66108LM5071MT-80 Datasheet

Current PartRFQ

LM5071MT-80/NOPB

Texas InstrumentsIn Stock: 2156LM5071MT-80/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM5071MT-80 is determined by strict alignment with the following electrical and mechanical parameters:

• Manufacturer: Texas Instruments (same manufacturer ensures design compatibility)
• Base Product Number: LM5071 (same silicon die and functional specification)
• Type: Controller (PD), DC/DC (identical functional classification)
• Number of Channels: 1 (single-channel architecture)
• Power - Max: 12.95 W (identical power rating)
• Internal Switch(s): Both (same switching configuration)
• Auxiliary Sense: Yes (same sensing capability)
• Standards: 802.3af (PoE) (identical protocol compliance)
• Voltage - Supply: 1.8V ~ 60V (identical supply range)
• Current - Supply: 1mA (identical quiescent current)
• Operating Temperature: -40°C ~ 125°C (identical thermal range)
• Package / Case: 16-TSSOP (0.173", 4.40mm Width) (identical footprint and pinout)

The LM5071MT-80/NOPB meets all substitution criteria as a direct equivalent part.

Parameter Comparison

Engineering Selection Recommendations

The LM5071MT-80/NOPB is the direct functional equivalent of the LM5071MT-80. Both parts share identical electrical specifications, pinout, and package footprint, ensuring drop-in compatibility at the circuit board level.

The primary distinction between these parts is product status and regulatory compliance. The LM5071MT-80/NOPB is currently active in production with ROHS3 compliance certification, whereas the original LM5071MT-80 is discontinued and RoHS non-compliant. For new designs or production runs, the LM5071MT-80/NOPB is the appropriate selection to ensure long-term component availability and regulatory alignment.

Both parts maintain identical thermal operating ranges (-40°C to 125°C) and supply voltage specifications (1.8V to 60V), confirming functional interchangeability in all application contexts.

Frequently Asked Questions (FAQ)

Q: Can the LM5071MT-80/NOPB be used as a direct replacement for the LM5071MT-80?

A: Yes. Both parts are manufactured by Texas Instruments, share the same base product number (LM5071), and possess identical electrical and mechanical specifications. The 16-TSSOP package footprint and pinout are identical, enabling direct board-level substitution without circuit modification.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix denotes "No Plumbum" (lead-free) packaging, indicating compliance with RoHS3 regulations. This is a packaging designation that does not affect electrical performance or functional compatibility.

Q: Are there differences in thermal performance between these parts?

A: No. Both the LM5071MT-80 and LM5071MT-80/NOPB operate across the identical temperature range of -40°C to 125°C. Thermal characteristics remain unchanged.

Q: Why is the original LM5071MT-80 discontinued?

A: The discontinuation reflects the industry-wide transition to RoHS-compliant components. The LM5071MT-80/NOPB represents the current production equivalent with updated regulatory compliance.

Q: Will the LM5071MT-80/NOPB work in existing designs originally specified for the LM5071MT-80?

A: Yes. Identical supply voltage range (1.8V to 60V), power rating (12.95W), channel configuration (1 channel), and 802.3af PoE standards compliance ensure full functional compatibility in all existing circuit designs.

Q: What is the package form factor for both parts?

A: Both parts use the 16-TSSOP package with a width of 0.173 inches (4.40mm). This surface-mount package is identical between the two part numbers, confirming PCB footprint compatibility.