LM5100CMY/NOPB Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5100CMY/NOPB is a half-bridge gate driver IC manufactured by Texas Instruments, designed for driving N-channel MOSFETs in half-bridge configurations. This device operates with a supply voltage range of 9V to 14V and delivers independent gate drive signals with non-inverting logic. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

LM5100CMY/NOPB

Texas InstrumentsIn Stock: 3237LM5100CMY/NOPB Datasheet

Current PartRFQ

LM5100BMAX/NOPB

Texas InstrumentsIn Stock: 2284LM5100BMAX/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM5100CMY/NOPB is determined by the following critical parameters that must remain consistent:

Functional Requirements:

• Half-bridge gate driver configuration with 2 independent drivers
• N-channel MOSFET gate drive capability
• Non-inverting input logic
• Supply voltage range: 9V ~ 14V
• Logic input threshold: 2.3V minimum
• Bootstrap voltage capability: 118V maximum
• Operating temperature range: -40°C ~ 125°C

Mechanical & Compliance Requirements:

• Surface mount packaging (8-pin variants acceptable)
• RoHS3 compliance
• MSL Level 1 rating

The primary substitute identified is the LM5100BMAX/NOPB, which maintains all functional parameters while offering improved electrical performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The LM5100BMAX/NOPB is the primary substitute for the obsolete LM5100CMY/NOPB. Both devices maintain identical functional specifications for half-bridge gate driver operation, supply voltage range, logic thresholds, and bootstrap voltage capability. The substitute offers enhanced electrical performance with doubled peak output current (2A versus 1A) and faster switching times (570ns/430ns rise/fall versus 990ns/715ns).

The LM5100BMAX/NOPB carries active product status from Texas Instruments, ensuring continued availability and technical support. Both parts maintain ROHS3 compliance and MSL Level 1 ratings, meeting identical environmental and regulatory requirements.

Package geometry differs between the two variants: the original uses 8-MSOP (0.118" width), while the substitute uses 8-SOIC (0.154" width). PCB layout modifications are required to accommodate the larger package footprint.

Frequently Asked Questions (FAQ)

Q: Can the LM5100BMAX/NOPB directly replace the LM5100CMY/NOPB without circuit modifications?

A: Functional substitution is valid due to identical supply voltage, logic thresholds, bootstrap voltage, and gate drive configuration. However, package geometry differs (8-MSOP versus 8-SOIC), requiring PCB layout changes. Pin-to-pin compatibility must be verified against the specific PCB design.

Q: What are the key differences between these two parts?

A: The substitute offers improved performance: peak output current increases from 1A to 2A, and switching times are faster (570ns/430ns versus 990ns/715ns). The original part is obsolete; the substitute is active. Package size is larger (0.154" versus 0.118" width).

Q: Are there compliance or certification differences?

A: Both parts maintain identical RoHS3 compliance and MSL Level 1 ratings. No compliance differences exist between the two variants.

Q: What is the impact of the faster rise/fall times in the substitute?

A: Faster switching times in the LM5100BMAX/NOPB may reduce gate drive delays and improve MOSFET switching performance. Circuit behavior should be validated in the target application to confirm compatibility with existing timing requirements.

Q: Is the increased output current rating of the substitute a concern?

A: The doubled output current (2A versus 1A) represents an enhancement that improves gate drive capability. This change is backward-compatible for applications designed around the original 1A specification.