LM5109MA Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5109MA 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 8V to 14V and delivers peak output currents of 1A for both source and sink operations. The LM5109MA is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity.

Substiute Parts

LM5109MA

Texas InstrumentsIn Stock: 3743LM5109MA Datasheet

Current PartRFQ

LM5109MA/NOPB

Texas InstrumentsIn Stock: 1611LM5109MA/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM5109MA is determined by strict equivalence across the following critical parameters:

• Driven Configuration: Half-Bridge topology
• Number of Drivers: 2 independent channels
• Gate Type: N-Channel MOSFET
• Supply Voltage Range: 8V ~ 14V
• Peak Output Current: 1A source and 1A sink capability
• Input Type: Non-Inverting
• Bootstrap Voltage Rating: 118V maximum
• Package Type: 8-SOIC form factor
• Operating Temperature Range: -40°C ~ 125°C

The LM5109MA/NOPB is identified as a direct substitute based on identical electrical specifications and mechanical compatibility. This part maintains all functional parameters while offering improved compliance status and availability through alternative packaging.

Parameter Comparison

Engineering Selection Recommendations

The LM5109MA/NOPB is the direct functional equivalent of the LM5109MA. Selection between these parts is determined by regulatory and compliance requirements:

LM5109MA/NOPB is the preferred substitute for new designs and production continuity. This part maintains identical electrical and mechanical specifications while offering ROHS3 compliance status. The Last Time Buy designation indicates controlled availability through the manufacturer, making it suitable for near-term production requirements. Tube packaging provides standard handling and storage compatibility with automated assembly processes.

LM5109MA remains available in limited inventory (3680 units) but carries obsolete status and RoHS non-compliance designation. This part is suitable only for legacy system maintenance or applications where RoHS compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can LM5109MA/NOPB be used as a direct replacement for LM5109MA in existing designs?

A: Yes. The LM5109MA/NOPB is electrically and mechanically identical to the LM5109MA. All electrical parameters, including supply voltage, output current, timing characteristics, and package dimensions, are equivalent. Direct substitution in PCB layouts and circuit designs is supported without modification.

Q: What is the difference between LM5109MA and LM5109MA/NOPB?

A: The primary differences are product status, RoHS compliance, and packaging format. LM5109MA/NOPB carries ROHS3 compliance and is designated Last Time Buy, while LM5109MA is obsolete and RoHS non-compliant. Both parts are functionally identical in electrical performance and 8-SOIC package form factor.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts operate across the identical temperature range (-40°C to 125°C junction temperature) and deliver identical rise and fall times (15ns typical). Thermal performance and switching characteristics are equivalent.

Q: What packaging options are available?

A: LM5109MA/NOPB is supplied in Tube packaging. Both parts use the 8-SOIC (0.154", 3.90mm width) surface mount package. Package dimensions and pin configurations are identical.

Q: Is the LM5109MA/NOPB suitable for new product designs?

A: LM5109MA/NOPB is suitable for new designs requiring half-bridge gate driver functionality with the specified electrical parameters. However, the Last Time Buy status indicates limited future availability. Long-term design strategies should evaluate alternative gate driver solutions from current product lines.