LM5111-1M Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5111-1M is a low-side gate driver IC manufactured by Texas Instruments, designed for driving N-channel MOSFETs in 8-SOIC packaging. This part is classified as obsolete with 1450 units in stock. Due to its obsolete status and limited availability, identifying equivalent and substitute parts is necessary for design continuity and long-term supply chain reliability. Substitute parts must maintain functional compatibility across driven configuration, channel type, gate type, and electrical performance parameters.

Key Parameters

Parameter	LM5111-1M
Manufacturer	Texas Instruments
Driven Configuration	Low-Side
Channel Type	Independent
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	Non-Inverting
Rise / Fall Time (Typ)	14ns, 12ns
Operating Temperature	-40°C ~ 125°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution logic is based on the following critical parameters that must be maintained or exceeded:

Driven Configuration: Low-Side (required match)
Channel Type: Independent (required match)
Number of Drivers: 2 (required match)
Input Type: Non-Inverting (required match)
Package / Case: 8-SOIC form factor (required match)
Voltage - Supply: Must encompass or exceed 4.6V ~ 14V range
Logic Voltage - VIL, VIH: Must be compatible with 0.8V, 2.2V thresholds
Current - Peak Output: Must meet or exceed 3A source and 5A sink requirements
Operating Temperature: Must support -40°C ~ 125°C range

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalent (Same Base Product): LM5111-1M/NOPB maintains identical electrical specifications with improved RoHS3 compliance and Last Time Buy status.

Cross-Manufacturer Alternatives: Parts from Analog Devices Inc. and Microchip Technology that meet or exceed the electrical and mechanical requirements while offering active product status and improved compliance certifications.

Parameter Comparison

Parameter	LM5111-1M	LM5111-1M/NOPB	ADP3654ARDZ-RL	MCP1404-E/SN	MIC4124YME	MIC4127YME	MIC4424YM	MIC4424YM-TR	TC4424AVOA	TC4427ACOA	TC4427AEOA
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Driven Configuration	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side
Channel Type	Independent	Independent	Independent	Independent	Independent	Independent	Independent	Independent	Independent	Independent	Independent
Number of Drivers	2	2	2	2	2	2	2	2	2	2	2
Gate Type	N-Channel MOSFET	N-Channel MOSFET	N-Channel MOSFET	IGBT, N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET
Voltage - Supply	4.6V ~ 14V	4.6V ~ 14V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 20V	4.5V ~ 20V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V
Logic Voltage - VIL, VIH	0.8V, 2.2V	0.8V, 2.2V	0.8V, 2V	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	0.8V, 2.4V
Current - Peak Output (Source, Sink)	3A, 5A	3A, 5A	4A, 4A	4.5A, 4.5A	3A, 3A	1.5A, 1.5A	3A, 3A	3A, 3A	4.5A, 4.5A	1.5A, 1.5A	1.5A, 1.5A
Input Type	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting
Rise / Fall Time (Typ)	14ns, 12ns	14ns, 12ns	10ns, 10ns	15ns, 18ns	11ns, 11ns	20ns, 18ns	28ns, 32ns	28ns, 32ns	12ns, 12ns	25ns, 25ns	25ns, 25ns
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width) Exposed Pad	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width) Exposed Pad	8-SOIC (0.154", 3.90mm Width) Exposed Pad	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)
Product Status	Obsolete	Last Time Buy	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct Equivalent: LM5111-1M/NOPB is the primary substitute, offering identical electrical specifications with improved RoHS3 compliance. This part maintains full functional compatibility and is recommended for immediate replacement in new designs.

Tier 2 - Active Cross-Manufacturer Alternatives: ADP3654ARDZ-RL (Analog Devices Inc.) and TC4424AVOA (Microchip Technology) are active products with enhanced electrical performance. Both exceed the original supply voltage range and offer improved rise/fall times. ADP3654ARDZ-RL provides balanced source and sink current (4A, 4A) with faster switching characteristics (10ns, 10ns). TC4424AVOA delivers higher peak output current (4.5A, 4.5A) with comparable switching speed (12ns, 12ns).

Tier 3 - Functional Alternatives with Trade-offs: MCP1404-E/SN supports extended operating temperature to 150°C and offers higher peak output current (4.5A, 4.5A). MIC4124YME provides extended supply voltage range to 20V with symmetric current capability (3A, 3A). MIC4424YM and MIC4424YM-TR offer the highest inventory availability with symmetric current (3A, 3A) but with slower switching characteristics (28ns, 32ns).

Not Recommended: MIC4127YME and TC4427ACOA/TC4427AEOA have reduced peak output current (1.5A, 1.5A), which does not meet the original 3A source / 5A sink specification. TC4427ACOA operates at reduced temperature range (0°C ~ 70°C), limiting applicability in extended temperature environments.

Frequently Asked Questions (FAQ)

Q: Can LM5111-1M be directly replaced with LM5111-1M/NOPB? A: Yes. LM5111-1M/NOPB is the direct equivalent with identical electrical specifications. The primary difference is improved RoHS3 compliance and packaging format (Tube vs. standard). This is the recommended first choice for replacement.

Q: What is the key difference between ADP3654ARDZ-RL and the original LM5111-1M? A: ADP3654ARDZ-RL extends the supply voltage range to 4.5V ~ 18V (vs. 4.6V ~ 14V) and offers faster switching times (10ns vs. 14ns rise time). Peak output current is balanced at 4A source and sink, compared to the original 3A source / 5A sink asymmetry. The package includes an exposed pad for improved thermal performance.

Q: Is TC4424AVOA suitable for applications requiring 5A sink current? A: TC4424AVOA provides 4.5A source and sink current, which approaches but does not fully meet the original 5A sink specification. For applications with strict 5A sink requirements, ADP3654ARDZ-RL or MCP1404-E/SN are better choices.

Q: Why are MIC4127YME and TC4427 variants not recommended as primary substitutes? A: These parts have reduced peak output current (1.5A, 1.5A), which does not meet the original specification of 3A source / 5A sink. They are suitable only for applications with lower current requirements.

Q: What is the impact of the exposed pad (EP) variant on PCB design? A: Exposed pad variants (ADP3654ARDZ-RL, MIC4124YME, MIC4127YME) provide improved thermal dissipation through direct connection to the PCB ground plane. This is beneficial in high-frequency switching applications but requires PCB layout modifications. Standard 8-SOIC packages without exposed pads are pin-compatible without layout changes.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are RoHS3 compliant, addressing the non-compliance status of the original LM5111-1M. This is a significant advantage for new designs and regulatory compliance.

Q: What is the operating temperature consideration when selecting a substitute? A: The original LM5111-1M operates from -40°C ~ 125°C (junction temperature). MCP1404-E/SN, MIC4424YM, MIC4424YM-TR, and TC4424AVOA extend this to -40°C ~ 150°C, providing additional margin for high-temperature applications. TC4427ACOA is limited to 0°C ~ 70°C and is not suitable for extended temperature ranges.

Q: Can substitute parts be used in existing PCB designs without modification? A: All substitute parts maintain the 8-SOIC form factor with 0.154" width and 3.90mm body width, ensuring pin-compatible replacement. Exposed pad variants require PCB layout modifications to utilize the thermal pad. Standard variants are direct drop-in replacements.

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