LM5111-3MX/NOPB Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5111-3MX/NOPB is a low-side gate driver IC manufactured by Texas Instruments, designed for driving N-Channel MOSFETs with independent inverting and non-inverting input channels. The device operates from a 4.6V to 14V supply and delivers peak output currents of 3A (source) and 5A (sink). Currently classified as Last Time Buy, this part requires identification of active substitute options to ensure long-term design continuity and supply chain reliability.

Substiute Parts

LM5111-3MX/NOPB

Texas InstrumentsIn Stock: 3765LM5111-3MX/NOPB Datasheet

Current PartRFQ

UCC27425DR

Texas InstrumentsIn Stock: 4015UCC27425DR Datasheet

MFR RecommendedRFQ

MCP1405-E/SN

Microchip TechnologyIn Stock: 1371MCP1405-E/SN Datasheet

MFR RecommendedRFQ

MIC4125YME

Microchip TechnologyIn Stock: 2111MIC4125YME Datasheet

MFR RecommendedRFQ

MIC4125YME-TR

Microchip TechnologyIn Stock: 1000281MIC4125YME-TR Datasheet

MFR RecommendedRFQ

MIC4128YME

Microchip TechnologyIn Stock: 1890MIC4128YME Datasheet

MFR RecommendedRFQ

MIC4425YM

Microchip TechnologyIn Stock: 1411MIC4425YM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Driven Configuration: Must be Low-Side
• Number of Drivers: Must be 2 independent channels
• Input Type: Must support both Inverting and Non-Inverting configurations
• Package / Case: Must be 8-SOIC form factor (0.154", 3.90mm Width)
• Mounting Type: Must be Surface Mount
• Supply Voltage Range: Must encompass or exceed 4.6V ~ 14V minimum operating window
• Peak Output Current: Source and sink capabilities must meet or exceed application requirements
• Operating Temperature Range: Must support -40°C ~ 125°C minimum
• Compliance: Must maintain ROHS3 compliance and REACH unaffected status

All substitute parts listed below satisfy these core substitution criteria and are classified as Active products, ensuring continued availability and manufacturer support.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Highest Compatibility): UCC27425DR (Texas Instruments)

The UCC27425DR maintains Texas Instruments manufacturing continuity and Active product status. Supply voltage range (4V ~ 15V) encompasses the LM5111-3MX/NOPB operating window. Peak output current (4A source, 4A sink) meets or exceeds typical application requirements. MSL rating of 1 (Unlimited) matches the original part's moisture sensitivity profile. ROHS3 compliance and REACH unaffected status are maintained.

Secondary Substitutes (Functional Equivalence): MCP1405-E/SN, MIC4125YME, MIC4125YME-TR, MIC4425YM

These Microchip Technology parts satisfy all core substitution criteria. MCP1405-E/SN and MIC4425YM support extended operating temperature to 150°C. MIC4125YME and MIC4125YME-TR feature faster rise/fall times (11ns) compared to the original part. All maintain ROHS3 compliance and REACH unaffected status.

Not Recommended: MIC4128YME

Peak output current (1.5A source, 1.5A sink) falls below the LM5111-3MX/NOPB specification (3A source, 5A sink). This part is suitable only for applications with reduced current drive requirements.

Frequently Asked Questions (FAQ)

Q: Can UCC27425DR directly replace LM5111-3MX/NOPB in existing designs?

A: Yes. UCC27425DR maintains identical 8-SOIC package geometry, dual independent low-side driver configuration, and inverting/non-inverting input support. Supply voltage range (4V ~ 15V) encompasses the LM5111-3MX/NOPB operating window (4.6V ~ 14V). Pin-level compatibility requires verification against specific application schematics.

Q: What is the difference between MIC4125YME and MIC4125YME-TR?

A: Both parts are electrically identical with identical electrical specifications. The primary difference is packaging format: MIC4125YME is supplied in Tube packaging, while MIC4125YME-TR is supplied in Cut Tape (CT) & Digi-Reel format. MIC4125YME-TR carries MSL rating of 3 (168 Hours) versus MSL 2 (1 Year) for MIC4125YME, reflecting different moisture exposure limits during storage and handling.

Q: Why do some substitute parts have exposed pad (8-SOIC-EP) packages?

A: The exposed pad variant (8-SOIC-EP) provides enhanced thermal dissipation through direct connection to the die pad. MIC4125YME, MIC4125YME-TR, and MIC4128YME feature this design. Standard 8-SOIC packages (UCC27425DR, MCP1405-E/SN, MIC4425YM) do not include exposed pads. Package selection depends on thermal management requirements in the target application.

Q: Is MIC4128YME suitable as a substitute?

A: MIC4128YME meets package and configuration requirements but delivers reduced peak output current (1.5A source, 1.5A sink) compared to LM5111-3MX/NOPB (3A source, 5A sink). Substitution is valid only for applications with current drive requirements below 1.5A. Higher-current applications require UCC27425DR, MCP1405-E/SN, MIC4125YME, MIC4125YME-TR, or MIC4425YM.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original LM5111-3MX/NOPB. ECCN classification is EAR99 for all parts except MIC4425YM (HTSUS 8542.39.0060 versus 8542.39.0001 for other parts). Regulatory compliance verification for specific end-use applications remains the responsibility of the design engineer.