LM5100MX/NOPB Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5100MX/NOPB is a half-bridge gate driver IC manufactured by Texas Instruments, designed for driving N-channel MOSFETs in half-bridge configurations. This device features non-inverting logic inputs, independent channel control, and a maximum bootstrap voltage rating of 118V. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

LM5100MX/NOPB

Texas InstrumentsIn Stock: 22088LM5100MX/NOPB Datasheet

Current PartRFQ

UCC27210DDAR

Texas InstrumentsIn Stock: 5403UCC27210DDAR Datasheet

MFR RecommendedRFQ

MIC4100YM

Microchip TechnologyIn Stock: 3711MIC4100YM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM5100MX/NOPB is determined by the following critical parameters:

Functional Requirements:

• Half-bridge driven configuration with independent dual channels
• N-channel MOSFET gate driver capability
• Non-inverting logic input type
• Supply voltage range compatibility (9V ~ 14V minimum overlap)
• Bootstrap voltage rating (118V minimum)

Electrical Performance Criteria:

• Logic threshold levels (VIL, VIH) must accommodate 3V and 8V levels
• Peak output current capability (source and sink)
• Rise and fall time specifications
• Operating temperature range (-40°C ~ 125°C minimum)

Physical & Compliance Requirements:

• Surface mount packaging in 8-pin SOIC or compatible form factor
• ROHS3 compliance
• MSL rating of 1 or better

The identified substitute parts meet these core substitution criteria while offering enhanced or equivalent electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

UCC27210DDAR (Texas Instruments)

This part is recommended as the primary substitute for the LM5100MX/NOPB. It maintains the same half-bridge, independent dual-channel architecture with non-inverting logic inputs. The UCC27210DDAR offers superior electrical performance with 4A peak output current capability (versus 1.6A), faster switching times (7.2ns/5.5ns rise/fall), and an extended supply voltage range (8V ~ 17V). The 8-PowerSOIC package provides improved thermal characteristics through the integrated PowerPad. All regulatory requirements are met: ROHS3 compliant, MSL 1, and REACH unaffected. The part carries a Last Time Buy status, indicating limited future availability.

MIC4100YM (Microchip Technology)

This part serves as an alternative substitute, offering active product status and long-term availability. The MIC4100YM maintains identical logic voltage thresholds (3V, 8V) and bootstrap voltage rating (118V) as the original LM5100MX/NOPB, ensuring direct functional compatibility. Peak output current is rated at 2A (source and sink), exceeding the original 1.6A specification. Rise and fall times of 400ns represent an improvement over the original 600ns specification. The 8-SOIC package matches the original form factor exactly. Full ROHS3 compliance and MSL 1 rating are maintained.

Frequently Asked Questions (FAQ)

Q: Can the UCC27210DDAR be used as a direct replacement for the LM5100MX/NOPB?

A: Yes. Both devices share identical half-bridge gate driver architecture, independent dual-channel configuration, and non-inverting logic input type. The UCC27210DDAR operates within the LM5100MX/NOPB supply voltage range (9V ~ 14V falls within 8V ~ 17V) and meets all bootstrap voltage and logic threshold requirements. The 8-PowerSOIC package is mechanically compatible with 8-SOIC footprints in most applications, though thermal performance is enhanced.

Q: What are the key differences between the UCC27210DDAR and MIC4100YM?

A: The UCC27210DDAR provides higher peak output current (4A versus 2A) and significantly faster switching times (7.2ns/5.5ns versus 400ns). The UCC27210DDAR uses an 8-PowerSOIC package with integrated thermal pad, while the MIC4100YM uses standard 8-SOIC. The MIC4100YM offers active product status and longer-term availability. Both meet all functional and compliance requirements for substitution.

Q: Is the MIC4100YM a pin-for-pin replacement?

A: Yes. The MIC4100YM shares identical pinout and 8-SOIC package dimensions with the LM5100MX/NOPB. Logic voltage thresholds and bootstrap voltage ratings are identical, ensuring direct functional compatibility without circuit modifications.

Q: Are there supply voltage compatibility concerns with these substitutes?

A: No. The original LM5100MX/NOPB operates at 9V ~ 14V. The UCC27210DDAR range of 8V ~ 17V fully encompasses this specification. The MIC4100YM range of 9V ~ 16V also fully encompasses the original specification. Both substitutes are compatible with existing power supply designs.

Q: Do these substitutes maintain the same thermal operating range?

A: The MIC4100YM maintains the identical operating temperature range of -40°C ~ 125°C. The UCC27210DDAR extends this to -40°C ~ 140°C, providing additional margin for high-temperature applications. Both meet the original specification minimum.

Q: Are there any package considerations for PCB layout?

A: The MIC4100YM uses the same 8-SOIC package as the original part, requiring no layout changes. The UCC27210DDAR uses an 8-PowerSOIC package with an integrated thermal pad on the underside. This pad should be connected to ground for optimal thermal performance, though the device remains functional without this connection in standard applications.