LM5111-3M Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5111-3M is a low-side gate driver IC manufactured by Texas Instruments, designed for driving N-Channel MOSFETs in power management applications. This device features dual independent channels with inverting and non-inverting input configurations, operating from a 4.6V to 14V supply. The LM5111-3M is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across electrical characteristics, package form factor, and operational parameters.

Substiute Parts

LM5111-3M

Texas InstrumentsIn Stock: 6236LM5111-3M Datasheet

Current PartRFQ

LM5111-3MX/NOPB

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

MFR RecommendedRFQ

UCC27524AD

Texas InstrumentsIn Stock: 19447UCC27524AD 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 LM5111-3M is determined by the following critical parameters:

Primary Compatibility Criteria:

• Package / Case: 8-SOIC form factor (0.154", 3.90mm Width)
• Driven Configuration: Low-Side gate driver topology
• Number of Drivers: Dual independent channels
• Input Type: Support for both inverting and non-inverting configurations
• Gate Type: N-Channel MOSFET capability
• Mounting Type: Surface Mount

Electrical Operating Range:

• Supply voltage range must encompass or exceed 4.6V ~ 14V
• Peak output current (source and sink) must meet or exceed 3A source / 5A sink
• Logic voltage thresholds (VIL, VIH) must be compatible with 0.8V / 2.2V levels
• Operating temperature range must cover -40°C ~ 125°C

Secondary Considerations:

• Product status (active parts preferred for new designs)
• RoHS compliance status
• Moisture sensitivity level

Substitute parts are grouped based on their ability to satisfy these criteria while maintaining functional equivalence in the target application.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Preferred for Pin-Compatible Replacement):

LM5111-3MX/NOPB is the manufacturer-recommended equivalent, offering identical electrical specifications and package configuration. This part maintains the same supply voltage range (4.6V ~ 14V), output current ratings (3A source / 5A sink), and logic voltage thresholds. The primary distinction is active product status, making it suitable for new designs and production continuity.

Active Alternatives with Extended Supply Voltage Range:

UCC27524AD, MCP1405-E/SN, MIC4125YME, MIC4125YME-TR, and MIC4425YM are active products supporting higher supply voltage ranges (4.5V ~ 18V or 4.5V ~ 20V). These parts accommodate applications requiring extended voltage headroom while maintaining low-side gate driver functionality. UCC27524AD provides faster switching performance (7ns / 6ns rise/fall times) and extended operating temperature range (-40°C ~ 140°C). MCP1405-E/SN supports wider gate type compatibility (IGBT, N-Channel, P-Channel MOSFET) and higher operating temperature (-40°C ~ 150°C).

RoHS Compliance Consideration:

All substitute parts except LM5111-3MX/NOPB carry ROHS3 compliance certification. Applications subject to RoHS regulatory requirements should prioritize UCC27524AD, MCP1405-E/SN, MIC4125YME, MIC4125YME-TR, MIC4128YME, or MIC4425YM.

Output Current Derating:

MIC4128YME provides reduced peak output current (1.5A source / 1.5A sink) and is suitable only for applications with lower gate drive current requirements. This part is not recommended as a general substitute for the LM5111-3M.

Package Variant Consideration:

MIC4125YME, MIC4125YME-TR, and MIC4128YME feature 8-SOIC-EP (exposed pad) packaging, providing enhanced thermal dissipation compared to standard 8-SOIC. These variants are compatible with PCB layouts designed for exposed pad packages but require design verification for standard 8-SOIC footprints.

Frequently Asked Questions (FAQ)

Q: Can LM5111-3MX/NOPB be used as a direct replacement for LM5111-3M?

A: Yes. LM5111-3MX/NOPB is the manufacturer-recommended equivalent with identical electrical specifications, package configuration, and pin assignment. No design modifications are required for direct substitution.

Q: What is the primary difference between LM5111-3M and UCC27524AD?

A: UCC27524AD supports a higher supply voltage range (4.5V ~ 18V versus 4.6V ~ 14V), faster switching performance (7ns / 6ns rise/fall times versus 14ns / 12ns), and extended operating temperature range (-40°C ~ 140°C versus -40°C ~ 125°C). UCC27524AD input type is non-inverting only, whereas LM5111-3M supports both inverting and non-inverting configurations.

Q: Are the MIC4125YME variants compatible with standard 8-SOIC PCB footprints?

A: MIC4125YME and MIC4125YME-TR use 8-SOIC-EP (exposed pad) packaging. While pin pitch and lead positions are compatible with standard 8-SOIC layouts, the exposed pad requires PCB design consideration. Designs without exposed pad connections function correctly, but thermal performance may differ.

Q: Which substitute part offers the best thermal performance?

A: MIC4125YME, MIC4125YME-TR, and MIC4128YME feature exposed pad (EP) packaging, providing improved thermal dissipation compared to standard 8-SOIC variants. MCP1405-E/SN and MIC4425YM support the highest operating temperature range (-40°C ~ 150°C).

Q: Is MIC4128YME suitable as a general replacement for LM5111-3M?

A: MIC4128YME is not recommended as a general substitute due to significantly reduced peak output current (1.5A source / 1.5A sink versus 3A / 5A). This part is suitable only for applications with lower gate drive current requirements.

Q: What compliance certifications should be verified for new designs?

A: All substitute parts carry REACH Unaffected and EAR99 ECCN classifications. RoHS compliance status varies: LM5111-3M is RoHS non-compliant, while UCC27524AD, MCP1405-E/SN, MIC4125YME, MIC4125YME-TR, MIC4128YME, and MIC4425YM are ROHS3 compliant. Applications subject to RoHS requirements should select ROHS3-compliant alternatives.

Q: Can substitute parts with higher supply voltage ratings be used in 4.6V ~ 14V applications?

A: Yes. Parts rated for 4.5V ~ 18V or 4.5V ~ 20V supply ranges are compatible with 4.6V ~ 14V applications, provided the minimum supply voltage requirement (4.5V) is met in the target circuit. Designs operating below 4.5V require LM5111-3M or LM5111-3MX/NOPB.