LM5041ASD/NOPB Equivalent & Substitute Parts

Part Overview

The LM5041ASD/NOPB is a Half-Bridge, Push-Pull Regulator controller IC manufactured by Texas Instruments, designed for positive output Step-Up/Step-Down DC-DC conversion applications. This device operates as a transistor driver with integrated control features including dead time control, frequency control, and soft start functionality. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this controller topology.

Substiute Parts

LM5041ASD/NOPB

Texas InstrumentsIn Stock: 8466LM5041ASD/NOPB Datasheet

Current PartRFQ

LM5041AMTCX/NOPB

Texas InstrumentsIn Stock: 3845LM5041AMTCX/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM5041ASD/NOPB is determined by strict equivalence across the following critical parameters:

• Base product number (LM5041 series)
• Functional topology (Half-Bridge, Push-Pull regulator controller)
• Output type and configuration (Transistor Driver, Positive output)
• Electrical specifications (15V ~ 90V supply, 200kHz/600kHz switching frequency)
• Control feature set (Dead Time Control, Frequency Control, Soft Start)
• Operating temperature range (-40°C ~ 125°C)
• Compliance certifications (ROHS3, REACH Unaffected)

The primary difference between the main part and its substitute lies in packaging format and product status. The LM5041AMTCX/NOPB maintains identical electrical and functional characteristics while offering an alternative package type suitable for different assembly and supply chain requirements.

Parameter Comparison

Engineering Selection Recommendations

The LM5041AMTCX/NOPB is the recommended substitute for the LM5041ASD/NOPB based on the following engineering criteria:

Functional Equivalence: Both parts share identical electrical specifications, control features, and operational characteristics. The LM5041 base product number confirms core design compatibility.

Compliance Alignment: Both parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory requirements are met in either configuration.

Product Status Advantage: The substitute part carries Active product status, providing superior long-term availability and supply chain stability compared to the Last Time Buy status of the main part.

Package Consideration: The primary distinction is packaging format. The main part uses 16-WFDFN (5x5mm) while the substitute uses 16-TSSOP. PCB layout and thermal management requirements must be evaluated for your specific application, as these packages have different footprints and thermal characteristics.

Frequently Asked Questions (FAQ)

Q: Are the LM5041ASD/NOPB and LM5041AMTCX/NOPB electrically identical?

A: Yes. Both parts implement the same Half-Bridge, Push-Pull controller topology with identical electrical specifications, supply voltage range (15V ~ 90V), switching frequencies (200kHz, 600kHz), and control features (Dead Time Control, Frequency Control, Soft Start).

Q: What is the main difference between these two parts?

A: The primary difference is packaging. The LM5041ASD/NOPB uses 16-WFDFN (5x5mm) with exposed pad, while the LM5041AMTCX/NOPB uses 16-TSSOP (0.173" width, 4.40mm). Both are surface mount packages with identical pin counts and functionality.

Q: Can I use the LM5041AMTCX/NOPB as a direct replacement in my design?

A: Electrical substitution is valid. However, PCB layout changes are required due to different package footprints. Verify that your PCB design can accommodate the 16-TSSOP package dimensions and that thermal management requirements are met for your application.

Q: Why is the main part marked as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued production of the LM5041ASD/NOPB variant. The LM5041AMTCX/NOPB remains in Active production, making it the preferred choice for new designs and ongoing supply requirements.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH Unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. Regulatory and environmental compliance is equivalent.

Q: What should I verify before switching to the substitute part?

A: Verify PCB layout compatibility with the 16-TSSOP package footprint, confirm thermal management is adequate for your application, and validate that the different package dimensions do not conflict with your mechanical design constraints.