LM5111-2M Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5111-2M 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, making equivalent and substitute parts necessary for new designs and production continuity. The LM5111-2M operates with a supply voltage range of 4.6V to 14V and delivers peak output currents of 3A (source) and 5A (sink), suitable for applications requiring independent dual-channel gate driving with inverting logic.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LM5111-2M
Category	Power Management (PMIC)
Description	IC GATE DRVR LOW-SIDE 8SOIC
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
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 for the LM5111-2M is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Driven Configuration: Low-Side
Number of Drivers: 2 (independent channels)
Input Type: Inverting
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

Electrical Compatibility Range:

Supply Voltage: Must encompass or overlap with 4.6V ~ 14V
Logic Voltage Thresholds: VIL ≤ 0.8V, VIH ≥ 2.2V
Peak Output Current (Sink): Minimum 5A to match source capability
Operating Temperature: Must support -40°C ~ 125°C minimum

Substitution Categories:

Direct Equivalent (Identical Base Product): LM5111-2M/NOPB differs only in packaging (Tube vs. standard) and RoHS compliance status (ROHS3 Compliant vs. non-compliant). This part maintains identical electrical specifications and is a direct replacement.

Compatible Substitutes (Broader Electrical Envelope): IR4426SPBF, IR4426STRPBF, IRS4426STRPBF, MCP1403-E/SN, MCP1403T-E/SN, MIC4123YME, MIC4123YME-TR, MIC4126YME, and MIC4126YME-TR meet the core functional requirements (low-side, dual-channel, inverting, 8-SOIC) but operate within extended supply voltage ranges (4.5V ~ 20V or 6V ~ 20V) and may have different output current ratings or timing characteristics. These parts are suitable for applications where the LM5111-2M's specific electrical parameters are not critical constraints.

Parameter Comparison

Part Number	Manufacturer	Supply Voltage	Logic VIL, VIH	Peak Output (Source, Sink)	Rise/Fall Time (Typ)	Operating Temp	Package	Product Status	RoHS Status
LM5111-2M	Texas Instruments	4.6V ~ 14V	0.8V, 2.2V	3A, 5A	14ns, 12ns	-40°C ~ 125°C	8-SOIC	Obsolete	RoHS non-compliant
LM5111-2M/NOPB	Texas Instruments	4.6V ~ 14V	0.8V, 2.2V	3A, 5A	14ns, 12ns	-40°C ~ 125°C	8-SOIC	Last Time Buy	ROHS3 Compliant
IR4426SPBF	Infineon Technologies	6V ~ 20V	0.8V, 2.7V	2.3A, 3.3A	15ns, 10ns	-40°C ~ 150°C	8-SOIC	Obsolete	ROHS3 Compliant
IR4426STRPBF	Infineon Technologies	6V ~ 20V	0.8V, 2.7V	2.3A, 3.3A	15ns, 10ns	-40°C ~ 150°C	8-SOIC	Active	ROHS3 Compliant
IRS4426STRPBF	Infineon Technologies	6V ~ 20V	0.8V, 2.5V	2.3A, 3.3A	25ns, 25ns	-40°C ~ 150°C	8-SOIC	Active	ROHS3 Compliant
MCP1403-E/SN	Microchip Technology	4.5V ~ 18V	0.8V, 2.4V	4.5A, 4.5A	15ns, 18ns	-40°C ~ 150°C	8-SOIC	Active	ROHS3 Compliant
MCP1403T-E/SN	Microchip Technology	4.5V ~ 18V	0.8V, 2.4V	4.5A, 4.5A	15ns, 18ns	-40°C ~ 150°C	8-SOIC	Active	ROHS3 Compliant
MIC4123YME	Microchip Technology	4.5V ~ 20V	0.8V, 2.4V	3A, 3A	11ns, 11ns	-40°C ~ 125°C	8-SOIC-EP	Active	ROHS3 Compliant
MIC4123YME-TR	Microchip Technology	4.5V ~ 20V	0.8V, 2.4V	3A, 3A	11ns, 11ns	-40°C ~ 125°C	8-SOIC-EP	Active	ROHS3 Compliant
MIC4126YME	Microchip Technology	4.5V ~ 20V	0.8V, 2.4V	1.5A, 1.5A	20ns, 18ns	-40°C ~ 125°C	8-SOIC-EP	Active	ROHS3 Compliant
MIC4126YME-TR	Microchip Technology	4.5V ~ 20V	0.8V, 2.4V	1.5A, 1.5A	20ns, 18ns	-40°C ~ 125°C	8-SOIC-EP	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): LM5111-2M/NOPB is the primary choice. It maintains all electrical specifications of the original LM5111-2M while offering ROHS3 compliance and Last Time Buy status, providing a clear upgrade path for existing designs.

For Active Production with Extended Supply Range: IR4426STRPBF and IRS4426STRPBF (Infineon) are active products suitable for applications requiring supply voltages up to 20V. Both maintain the 8-SOIC package and low-side dual-channel configuration. IR4426STRPBF delivers higher sink current (3.3A) compared to the LM5111-2M (5A), while IRS4426STRPBF has slower rise/fall times (25ns vs. 12ns/14ns). These parts are ROHS3 compliant.

For Higher Output Current Capability: MCP1403-E/SN and MCP1403T-E/SN (Microchip) provide symmetric 4.5A source and sink currents, exceeding the LM5111-2M's 3A source capability. Supply voltage range is 4.5V ~ 18V. Both are active products with ROHS3 compliance and extended operating temperature to 150°C.

For Faster Switching Performance: MIC4123YME and MIC4123YME-TR (Microchip) offer the fastest rise/fall times (11ns) among available substitutes, with symmetric 3A output current. Supply range extends to 20V. These parts feature exposed pad (8-SOIC-EP) packaging and are ROHS3 compliant.

For Lower Output Current Applications: MIC4126YME and MIC4126YME-TR (Microchip) are suitable when peak output current requirements are lower (1.5A source/sink). These parts maintain the 8-SOIC-EP package and ROHS3 compliance with extended supply voltage to 20V.

Compliance Consideration: All substitute parts listed are ROHS3 compliant, addressing the non-compliance status of the original LM5111-2M. This is critical for new designs subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can I use IR4426STRPBF as a direct replacement for LM5111-2M? A: IR4426STRPBF is functionally compatible as a low-side dual-channel gate driver in 8-SOIC packaging with inverting logic. However, it differs in supply voltage range (6V ~ 20V vs. 4.6V ~ 14V), peak output current (2.3A/3.3A vs. 3A/5A), and rise/fall times (15ns/10ns vs. 14ns/12ns). Use IR4426STRPBF only if your application's supply voltage is ≥6V and output current requirements do not exceed 2.3A source or 3.3A sink.

Q: What is the difference between MIC4123YME and MIC4123YME-TR? A: Both parts are electrically identical. MIC4123YME is supplied in Tube packaging, while MIC4123YME-TR is supplied in Cut Tape (CT) & Digi-Reel® format. The moisture sensitivity level differs (MSL 2 vs. MSL 3), affecting storage and handling requirements. Select based on packaging and moisture sensitivity requirements for your manufacturing process.

Q: Why does LM5111-2M/NOPB have different RoHS status than LM5111-2M? A: LM5111-2M/NOPB is ROHS3 compliant, indicating it meets current RoHS Directive requirements and contains no restricted substances. The original LM5111-2M is non-compliant, making LM5111-2M/NOPB the preferred choice for new designs and applications subject to RoHS regulations.

Q: Can MIC4126YME replace LM5111-2M in high-current applications? A: No. MIC4126YME has lower peak output current (1.5A source/sink) compared to LM5111-2M (3A/5A). Use MIC4126YME only in applications where output current requirements do not exceed 1.5A. For higher current demands, select MCP1403-E/SN or MIC4123YME.

Q: Are all substitute parts available in 8-SOIC packaging? A: Yes, all listed substitutes use 8-SOIC or 8-SOIC-EP (exposed pad) packaging with identical 0.154" (3.90mm) width. The exposed pad variant (8-SOIC-EP) provides improved thermal performance but maintains PCB layout compatibility with standard 8-SOIC footprints.

Q: What is the operating temperature range difference between LM5111-2M and its substitutes? A: LM5111-2M operates from -40°C to 125°C. Most substitutes (IR4426, IRS4426, MCP1403, MIC4123, MIC4126 series) extend the upper limit to 150°C, providing better performance in high-temperature environments. Select based on your application's thermal requirements.

Q: Can I use MCP1403-E/SN in a 4.6V supply application? A: No. MCP1403-E/SN minimum supply voltage is 4.5V, which exceeds the LM5111-2M's 4.6V minimum. For applications requiring operation below 4.5V, use LM5111-2M/NOPB or verify that your actual supply voltage is ≥4.5V before selecting MCP1403-E/SN.

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