LM5111-2MYX Equivalent & Substitute Parts

Part Overview

The LM5111-2MYX is a low-side gate driver IC manufactured by Texas Instruments, designed for driving N-channel MOSFETs in power management applications. This device operates with an inverting input configuration and supports independent dual-channel operation. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

LM5111-2MYX

Texas InstrumentsIn Stock: 855LM5111-2MYX Datasheet

Current PartRFQ

MIC4126YMME

Microchip TechnologyIn Stock: 2301MIC4126YMME Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM5111-2MYX is determined by the following critical parameters:

• Driven configuration: Low-side operation only
• Channel type: Independent dual-channel architecture
• Gate type: N-channel MOSFET driver capability
• Input type: Inverting logic configuration
• Package compatibility: 8-MSOP form factor with 0.118" (3.00mm) width
• Mounting type: Surface mount technology
• Operating temperature range: -40°C to 125°C minimum

The MIC4126YMME from Microchip Technology meets these core functional and physical requirements, maintaining compatibility across the specified electrical and mechanical parameters while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The MIC4126YMME is the qualified substitute for the obsolete LM5111-2MYX based on functional equivalence across all critical parameters. The substitute maintains identical driven configuration, channel topology, gate type, input logic, and package form factor.

Key considerations for selection:

• The MIC4126YMME carries active product status, ensuring long-term availability and manufacturing support compared to the obsolete LM5111-2MYX.
• The substitute achieves ROHS3 compliance, whereas the original part is RoHS non-compliant, providing regulatory advantage for new designs and procurement.
• Supply voltage range expands from 4.6V–14V to 4.5V–20V, offering broader operational flexibility in the substitute.
• Peak output current specifications differ: the original provides 3A source and 5A sink capability, while the substitute provides 1.5A symmetrical output. Design verification is required if peak current specifications are critical to application performance.
• Rise and fall time characteristics show minor degradation in the substitute (20ns/18ns versus 14ns/12ns), which may impact switching frequency performance in high-speed applications.
• Moisture sensitivity increases from MSL 1 to MSL 3, requiring adjusted storage and handling protocols.

Frequently Asked Questions (FAQ)

Q: Can the MIC4126YMME directly replace the LM5111-2MYX without PCB modifications?

A: The MIC4126YMME uses the same 8-MSOP package footprint with 0.118" (3.00mm) width, enabling direct PCB placement compatibility. However, the MIC4126YMME includes an exposed pad variant, which may require PCB layout adjustments for thermal management if the original design did not account for this feature.

Q: What are the functional differences between these parts?

A: Both parts operate as low-side gate drivers with independent dual-channel, inverting input configuration for N-channel MOSFETs. The primary differences are peak output current capacity (3A/5A versus 1.5A/1.5A), switching speed (14ns/12ns versus 20ns/18ns rise/fall time), and supply voltage range (4.6V–14V versus 4.5V–20V).

Q: Is the MIC4126YMME suitable for high-frequency switching applications?

A: The MIC4126YMME exhibits slightly slower switching characteristics (20ns/18ns) compared to the LM5111-2MYX (14ns/12ns). Applications requiring maximum switching frequency should evaluate whether this timing difference impacts system performance.

Q: What compliance advantages does the MIC4126YMME offer?

A: The MIC4126YMME is ROHS3 compliant and REACH unaffected, whereas the LM5111-2MYX is RoHS non-compliant. This makes the substitute suitable for applications with regulatory compliance requirements.

Q: Are there storage or handling differences between these parts?

A: The MIC4126YMME has MSL 3 (168 hours) moisture sensitivity, compared to MSL 1 (unlimited) for the LM5111-2MYX. This requires stricter moisture control during storage and handling, with desiccant packaging and controlled humidity environments during assembly.

Q: What is the minimum supply voltage for the MIC4126YMME?

A: The MIC4126YMME operates at a minimum supply voltage of 4.5V, compared to 4.6V for the LM5111-2MYX. Designs operating below 4.5V cannot use this substitute without additional voltage regulation.