LM5111-4MX/NOPB Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5111-4MX/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 components for ongoing design implementations and production continuity.

Key Parameters

Parameter	LM5111-4MX/NOPB
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
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 for the LM5111-4MX/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 Inverting and Non-Inverting configurations
Package / Case: Must be 8-SOIC form factor (0.154", 3.90mm Width)
Operating Temperature Range: Must encompass or exceed -40°C ~ 125°C
Supply Voltage Range: Must accommodate the application's supply voltage requirements
Peak Output Current: Must meet or exceed the required source and sink current specifications
Logic Voltage Thresholds: Must be compatible with the control signal levels

Substitute parts are grouped into two categories based on gate type compatibility and output current capability:

Category A - Enhanced Capability Substitutes: Parts supporting both N-Channel and P-Channel MOSFETs with higher or equivalent output current ratings (UCC27425DR, MCP1405-E/SN, MIC4425YM).

Category B - Direct Functional Equivalents: Parts with N-Channel MOSFET support and equivalent or lower output current ratings (MIC4125YME, MIC4125YME-TR, MIC4128YME).

Parameter Comparison

Parameter	LM5111-4MX/NOPB	UCC27425DR	MCP1405-E/SN	MIC4125YME	MIC4125YME-TR	MIC4128YME	MIC4425YM
Manufacturer	Texas Instruments	Texas Instruments	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
Number of Drivers	2	2	2	2	2	2	2
Gate Type	N-Channel MOSFET	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, P-Channel MOSFET
Voltage - Supply	4.6V ~ 14V	4V ~ 15V	4.5V ~ 18V	4.5V ~ 20V	4.5V ~ 20V	4.5V ~ 20V	4.5V ~ 18V
Logic Voltage - VIL, VIH	0.8V, 2.2V	1V, 2V	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	4A, 4A	4.5A, 4.5A	3A, 3A	3A, 3A	1.5A, 1.5A	3A, 3A
Input Type	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	20ns, 15ns	15ns, 18ns	11ns, 11ns	11ns, 11ns	20ns, 18ns	28ns, 32ns
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TA)	-40°C ~ 150°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 150°C (TJ)
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) Exposed Pad	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)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	3 (168 Hours)	2 (1 Year)	1 (Unlimited)

Engineering Selection Recommendations

UCC27425DR (Texas Instruments): Active product status with ROHS3 compliance and MSL 1. Supports N-Channel and P-Channel MOSFETs with 4A source and 4A sink output current. Supply voltage range 4V ~ 15V accommodates the LM5111-4MX/NOPB application window. Slower rise/fall times (20ns, 15ns) compared to the original part.

MCP1405-E/SN (Microchip Technology): Active product with extended operating temperature range (-40°C ~ 150°C) and ROHS3 compliance. Supports IGBT, N-Channel, and P-Channel MOSFETs with 4.5A symmetric output current. Supply voltage range 4.5V ~ 18V exceeds original specifications. MSL 1 rating provides unlimited shelf life.

MIC4125YME (Microchip Technology): Active product with ROHS3 compliance. Provides 3A symmetric output current matching the original sink specification. Exposed pad package variant with faster rise/fall times (11ns, 11ns). MSL 2 rating requires 1-year shelf life management.

MIC4125YME-TR (Microchip Technology): Active product with tape and reel packaging. Identical electrical specifications to MIC4125YME with 3A symmetric output current and 11ns rise/fall times. MSL 3 rating requires 168-hour shelf life management. Highest inventory availability (1,000,199 pcs).

MIC4128YME (Microchip Technology): Active product supporting N-Channel MOSFETs only. Output current limited to 1.5A symmetric, below the original part's 3A/5A specification. Suitable only for applications with reduced current requirements. MSL 2 rating.

MIC4425YM (Microchip Technology): Active product with extended operating temperature range (-40°C ~ 150°C) and ROHS3 compliance. Supports N-Channel and P-Channel MOSFETs with 3A symmetric output current. Slower rise/fall times (28ns, 32ns). MSL 1 rating provides unlimited shelf life.

Frequently Asked Questions (FAQ)

Q: Can I use MIC4128YME as a direct replacement for LM5111-4MX/NOPB?

A: MIC4128YME is not recommended as a direct replacement. While it maintains the same package form factor and low-side gate driver configuration, its peak output current is limited to 1.5A symmetric, which is below the original part's 3A source and 5A sink specification. Use only if your application requires less than 1.5A output current.

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

A: Both parts have identical electrical specifications (3A symmetric output, 11ns rise/fall times, 4.5V ~ 20V supply range). The primary difference is packaging: MIC4125YME is supplied in tube format, while MIC4125YME-TR is supplied in cut tape and Digi-Reel format. MIC4125YME-TR has higher inventory availability and different moisture sensitivity level (MSL 3 vs. MSL 2).

Q: Does the exposed pad on MIC4125YME and MIC4128YME affect PCB layout?

A: Yes. The exposed pad variant (8-SOIC-EP) requires thermal management consideration in PCB design. The exposed pad should be connected to ground or a thermal plane as specified in the device datasheet. Standard 8-SOIC packages (UCC27425DR, MIC4425YM) do not include this feature.

Q: Which substitute part has the fastest switching performance?

A: MIC4125YME and MIC4125YME-TR offer the fastest rise and fall times at 11ns each, compared to the original LM5111-4MX/NOPB at 14ns and 12ns respectively.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (UCC27425DR, MCP1405-E/SN, MIC4125YME, MIC4125YME-TR, MIC4128YME, MIC4425YM) are ROHS3 compliant and REACH unaffected.

Q: What is the minimum supply voltage for each substitute part?

A: UCC27425DR requires minimum 4V, while MCP1405-E/SN, MIC4125YME, MIC4125YME-TR, and MIC4128YME require minimum 4.5V. MIC4425YM also requires minimum 4.5V. The original LM5111-4MX/NOPB operates at minimum 4.6V, so applications with supply voltages below 4V cannot use any of these substitutes.

Q: Which substitute parts support P-Channel MOSFET driving?

A: UCC27425DR, MCP1405-E/SN, MIC4125YME, MIC4125YME-TR, and MIC4425YM support both N-Channel and P-Channel MOSFETs. MIC4128YME supports N-Channel MOSFETs only.

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