LM5111-3MY/NOPB Equivalent & Substitute Parts

Part Overview

The LM5111-3MY/NOPB is a low-side gate driver IC manufactured by Texas Instruments, designed for driving N-Channel MOSFETs in power management applications. This dual-channel, independent gate driver operates across a 4.6V to 14V supply range with peak output currents of 3A (source) and 5A (sink). The device is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain functional compatibility while offering continued availability and support.

Substiute Parts

LM5111-3MY/NOPB

Texas InstrumentsIn Stock: 837LM5111-3MY/NOPB Datasheet

Current PartRFQ

LM5111-3MX/NOPB

National SemiconductorIn Stock: 3846LM5111-3MX/NOPB Datasheet

MFR RecommendedRFQ

UCC27524AD

Texas InstrumentsIn Stock: 19447UCC27524AD Datasheet

MFR RecommendedRFQ

UCC27525DGNR

Texas InstrumentsIn Stock: 5947UCC27525DGNR Datasheet

MFR RecommendedRFQ

MIC4128YMME

Microchip TechnologyIn Stock: 2673MIC4128YMME Datasheet

MFR RecommendedRFQ

MIC4128YMME-TR

Microchip TechnologyIn Stock: 2014MIC4128YMME-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM5111-3MY/NOPB is determined by the following critical parameters:

• Driven Configuration: Must be Low-Side
• Number of Drivers: Must be 2 (dual-channel)
• Channel Type: Must be Independent
• Gate Type: Must support N-Channel MOSFET (IGBT support is acceptable as superset)
• Input Type: Must support both Inverting and Non-Inverting configurations
• Package Compatibility: 8-MSOP or 8-SOIC packages with exposed pad
• Supply Voltage Range: Must encompass or exceed 4.6V ~ 14V minimum requirement
• Logic Voltage Thresholds: VIL and VIH must be compatible with system logic levels
• Peak Output Current: Source and sink currents must meet or exceed application requirements
• Operating Temperature Range: Must support -40°C ~ 125°C minimum

Substitute parts are grouped into two categories: direct equivalents (same base product number with different packaging) and functional alternatives (different manufacturers with compatible electrical specifications).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

LM5111-3MX/NOPB is the direct equivalent of the obsolete LM5111-3MY/NOPB, sharing identical electrical specifications and the same base product number. The primary difference is packaging format (8-SOIC versus 8-MSOP). This part is active and widely available with 3750 units in stock. Selection of this part requires PCB layout modification to accommodate the larger 8-SOIC package footprint.

Functional Alternatives (Package-Compatible Substitutes):

UCC27525DGNR maintains the same 8-MSOP package footprint as the original part, eliminating PCB redesign requirements. This Texas Instruments part is active with enhanced specifications including higher peak output currents (5A source and sink) and faster switching times (7ns rise, 6ns fall). The supply voltage range extends to 18V, providing additional design margin. Inventory availability is 5876 units.

MIC4128YMME and MIC4128YMME-TR are Microchip Technology alternatives available in the same 8-MSOP package. These parts support the required dual-channel, independent, low-side configuration with inverting and non-inverting inputs. Peak output currents are reduced to 1.5A (source and sink), which may limit application in high-current switching scenarios. Rise and fall times are slower at 20ns and 18ns respectively. Moisture sensitivity level is MSL 3, requiring controlled storage conditions. These parts are suitable for lower-current gate drive applications.

UCC27524AD is a Texas Instruments alternative in 8-SOIC package. This part supports only non-inverting input configuration, which may restrict circuit topology flexibility compared to the original dual-input-type design. Peak output currents are 5A (source and sink), and switching times are faster (7ns rise, 6ns fall). Operating temperature range extends to 140°C.

Compliance and Certification:

All active substitute parts maintain ROHS3 compliance and EAR99 ECCN classification, consistent with the original part. All substitute parts are classified as REACH Unaffected.

Frequently Asked Questions (FAQ)

Q: Can LM5111-3MX/NOPB be used as a direct replacement without PCB modification?

A: LM5111-3MX/NOPB is electrically equivalent but uses 8-SOIC packaging instead of 8-MSOP. PCB layout modification is required to accommodate the different package footprint and pin spacing.

Q: What is the key difference between UCC27525DGNR and the original LM5111-3MY/NOPB?

A: UCC27525DGNR maintains the same 8-MSOP package, eliminating PCB redesign. Electrical differences include higher peak output currents (5A source and sink versus 3A/5A), faster switching times (7ns/6ns versus 14ns/12ns), and extended supply voltage range (4.5V ~ 18V versus 4.6V ~ 14V). These enhancements provide improved performance without requiring layout changes.

Q: Are MIC4128YMME parts suitable for all applications using LM5111-3MY/NOPB?

A: MIC4128YMME parts are suitable for applications with peak gate drive currents not exceeding 1.5A. Applications requiring higher output currents (3A source or 5A sink) should use UCC27525DGNR or UCC27524AD instead. MIC4128YMME parts also require MSL 3 moisture control during storage and handling.

Q: Why does UCC27524AD support only non-inverting input configuration?

A: UCC27524AD is designed for applications requiring non-inverting gate drive signals. Applications requiring inverting input capability must use UCC27525DGNR, MIC4128YMME, or LM5111-3MX/NOPB instead.

Q: What packaging considerations apply when selecting a substitute?

A: The original LM5111-3MY/NOPB uses 8-MSOP packaging. UCC27525DGNR, MIC4128YMME, and MIC4128YMME-TR maintain this footprint, allowing direct PCB substitution. LM5111-3MX/NOPB and UCC27524AD use 8-SOIC packaging, requiring PCB layout modification due to different pin spacing and package dimensions.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts are ROHS3 compliant. The original obsolete part is also ROHS3 compliant. Compliance status is consistent across all options.

Q: What is the significance of MSL rating differences?

A: The original part and most substitutes have MSL 1 (unlimited moisture sensitivity), allowing standard storage conditions. MIC4128YMME and MIC4128YMME-TR have MSL 3 (168 hours), requiring controlled humidity storage and baking procedures before reflow soldering if moisture absorption limits are exceeded.