LM5111-3M/NOPB Equivalent & Substitute Parts

Part Overview

The LM5111-3M/NOPB is a low-side gate driver IC manufactured by Texas Instruments, designed for driving N-channel MOSFETs in 8-SOIC packaging. This device features dual independent channels with inverting and non-inverting input configurations. The part is currently obsolete, making equivalent substitutes necessary for new designs and production continuity. Substitute parts must maintain compatibility across supply voltage ranges, output current ratings, input logic levels, and thermal operating specifications while preserving the 8-SOIC form factor.

Key Parameters

Parameter	LM5111-3M/NOPB
Driven Configuration	Low-Side
Number of Drivers	2
Gate Type	N-Channel MOSFET
Voltage - Supply	4.6V ~ 14V
Logic Voltage - VIL, VIH	0.8V, 2.2V
Current - Peak Output (Source, Sink)	3A, 5A
Input Type	Inverting, Non-Inverting
Rise / Fall Time (Typ)	14ns, 12ns
Operating Temperature	-40°C ~ 125°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Package Compatibility: All substitutes must use 8-SOIC form factor (0.154", 3.90mm Width)
Driven Configuration: Low-side driver topology required
Channel Count: Dual independent channels mandatory
Supply Voltage Range: Must encompass or exceed 4.6V ~ 14V minimum specification
Output Current: Peak source and sink current must meet or exceed 3A and 5A respectively
Input Configuration: Support for both inverting and non-inverting inputs required
Logic Voltage Levels: VIL and VIH must be compatible with 0.8V and 2.2V thresholds
Operating Temperature: Minimum -40°C to 125°C range required
Compliance: ROHS3 compliance and MSL rating verification

Substitute parts are grouped into two categories: direct replacements with identical or superior electrical specifications, and functional equivalents with extended operating ranges or enhanced performance characteristics.

Parameter Comparison

Parameter	LM5111-3M/NOPB	LM5111-3MX/NOPB	UCC27524AD	UCC27525DR	MCP1405-E/SN	MCP1405T-E/SN	MIC4125YME	MIC4125YME-TR	MIC4128YME	MIC4128YME-TR	MIC4425YM
Driven Configuration	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side
Number of Drivers	2	2	2	2	2	2	2	2	2	2	2
Gate Type	N-Channel MOSFET	N-Channel MOSFET	IGBT, N-Channel MOSFET	IGBT, N-Channel MOSFET	IGBT, N-Channel, P-Channel MOSFET	IGBT, N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel MOSFET	N-Channel MOSFET	N-Channel, P-Channel MOSFET
Voltage - Supply	4.6V ~ 14V	4.6V ~ 14V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 20V	4.5V ~ 20V	4.5V ~ 20V	4.5V ~ 20V	4.5V ~ 18V
Logic Voltage - VIL, VIH	0.8V, 2.2V	0.8V, 2.2V	1V, 2.3V	1V, 2.3V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V
Current - Peak Output (Source, Sink)	3A, 5A	3A, 5A	5A, 5A	5A, 5A	4.5A, 4.5A	4.5A, 4.5A	3A, 3A	3A, 3A	1.5A, 1.5A	1.5A, 1.5A	3A, 3A
Input Type	Inverting, Non-Inverting	Inverting, Non-Inverting	Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting
Rise / Fall Time (Typ)	14ns, 12ns	14ns, 12ns	7ns, 6ns	7ns, 6ns	15ns, 18ns	15ns, 18ns	11ns, 11ns	11ns, 11ns	20ns, 18ns	20ns, 18ns	28ns, 32ns
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 140°C	-40°C ~ 140°C	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 150°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC-EP (0.154", 3.90mm Width)	8-SOIC-EP (0.154", 3.90mm Width)	8-SOIC-EP (0.154", 3.90mm Width)	8-SOIC-EP (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Not Specified	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	3 (168 Hours)	2 (1 Year)	3 (168 Hours)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitute: LM5111-3MX/NOPB

The LM5111-3MX/NOPB is the manufacturer-recommended direct replacement. It maintains identical electrical specifications to the LM5111-3M/NOPB across all critical parameters including supply voltage range (4.6V ~ 14V), output current ratings (3A source, 5A sink), logic voltage thresholds, and rise/fall times. Both parts support inverting and non-inverting input configurations. The LM5111-3MX/NOPB is in active production status, ensuring long-term availability. This part is the preferred choice for direct substitution in existing designs.

Secondary Substitutes: UCC27524AD and UCC27525DR

The UCC27524AD and UCC27525DR are Texas Instruments low-side gate drivers in 8-SOIC packaging with enhanced specifications. Both support extended supply voltage range (4.5V ~ 18V) and improved output current capability (5A source and sink). The UCC27525DR provides dual input configuration support (inverting and non-inverting), matching the LM5111-3M/NOPB functionality. The UCC27524AD supports non-inverting input only. Both devices feature faster rise/fall times (7ns, 6ns) and extended operating temperature range (-40°C ~ 140°C). These parts are suitable for applications requiring higher performance margins or extended thermal operating range.

Tertiary Substitutes: MCP1405-E/SN and MCP1405T-E/SN

The MCP1405-E/SN and MCP1405T-E/SN are Microchip Technology low-side gate drivers offering extended supply voltage range (4.5V ~ 18V) and superior operating temperature range (-40°C ~ 150°C). Both support dual input configurations (inverting and non-inverting) and provide output current ratings of 4.5A source and sink. These parts are available in different packaging formats (tube and tape & reel). The extended temperature range makes these suitable for industrial and automotive applications. MSL rating of 1 (Unlimited) ensures compatibility with standard manufacturing processes.

Alternative Substitutes: MIC4125YME, MIC4125YME-TR, MIC4128YME, MIC4128YME-TR, and MIC4425YM

The Microchip MIC4125 and MIC4128 series provide low-side gate driver functionality with extended supply voltage range (4.5V ~ 20V). The MIC4125 variants deliver 3A source and sink current with 11ns rise/fall times. The MIC4128 variants provide reduced output current (1.5A source and sink) with slower switching characteristics (20ns, 18ns). The MIC4425YM offers 3A output current with extended operating temperature range (-40°C ~ 150°C). MIC4125 and MIC4128 parts feature 8-SOIC-EP packaging with exposed pad for enhanced thermal dissipation. These alternatives are suitable for applications where extended voltage range or thermal performance is beneficial.

Compliance Considerations

All recommended substitutes maintain ROHS3 compliance. Moisture sensitivity levels vary across alternatives; parts with MSL 1 (Unlimited) are preferred for standard manufacturing environments. Parts with MSL 2 or 3 require controlled storage and handling conditions. The LM5111-3MX/NOPB remains the optimal choice for direct replacement due to identical specifications and active production status.

Frequently Asked Questions (FAQ)

Q: Can UCC27524AD directly replace LM5111-3M/NOPB?

A: UCC27524AD is functionally compatible for applications using non-inverting input configuration only. It does not support inverting input mode. If your design requires inverting input capability, use UCC27525DR instead.

Q: What is the difference between MCP1405-E/SN and MCP1405T-E/SN?

A: Both parts have identical electrical specifications. The difference is packaging format: MCP1405-E/SN is supplied in tube packaging, while MCP1405T-E/SN is supplied in tape & reel format. Select based on your procurement and assembly requirements.

Q: Are MIC4125YME and MIC4125YME-TR interchangeable?

A: Yes, electrically they are identical. MIC4125YME is tube packaged, while MIC4125YME-TR is tape & reel packaged. The exposed pad (EP) variant provides improved thermal performance compared to standard 8-SOIC. Moisture sensitivity differs: MIC4125YME has MSL 2 (1 Year), while MIC4125YME-TR has MSL 3 (168 Hours).

Q: Why do some substitutes have higher supply voltage ratings?

A: Extended supply voltage ranges (4.5V ~ 18V or 4.5V ~ 20V) provide design flexibility for applications with varying power supply specifications. The LM5111-3M/NOPB operates within 4.6V ~ 14V. Substitutes with higher ratings are backward compatible with this range and offer additional margin for systems with higher supply voltages.

Q: Which substitute has the fastest switching speed?

A: UCC27524AD and UCC27525DR offer the fastest rise/fall times at 7ns and 6ns respectively, compared to the LM5111-3M/NOPB at 14ns and 12ns. Faster switching reduces gate drive delay and improves overall system efficiency in high-frequency applications.

Q: Is the 8-SOIC-EP package compatible with standard 8-SOIC PCB layouts?

A: Yes, 8-SOIC-EP (exposed pad variant) maintains the same pin footprint as standard 8-SOIC. The exposed pad provides additional thermal dissipation capability. Standard 8-SOIC PCB layouts can accommodate 8-SOIC-EP parts without modification, though thermal performance improves when the exposed pad is properly connected to ground plane.

Q: What is the impact of different operating temperature ranges?

A: The LM5111-3M/NOPB operates to 125°C. Substitutes with extended ranges (-40°C ~ 140°C or -40°C ~ 150°C) provide additional thermal margin for high-temperature environments. Select based on your application's maximum junction temperature requirements.

Q: Are all substitutes ROHS3 compliant?

A: Yes, all recommended substitutes are ROHS3 compliant. Compliance status is verified for each part. Moisture sensitivity levels vary; verify MSL requirements match your manufacturing and storage conditions.

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