LM5109ASD Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5109ASD 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 LM5109ASD is currently discontinued at DiGi Electronics, making identification of suitable substitute parts essential for ongoing production and design continuity.

Substiute Parts

LM5109ASD

Texas InstrumentsIn Stock: 2228LM5109ASD Datasheet

Current PartRFQ

LM5109ASD/NOPB

Texas InstrumentsIn Stock: 16185LM5109ASD/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM5109ASD are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Driven Configuration: Half-Bridge
• Number of Drivers: 2
• Gate Type: N-Channel MOSFET
• Input Type: Non-Inverting
• Voltage - Supply: 8V ~ 14V
• Current - Peak Output (Source, Sink): 1A, 1A
• Package / Case: 8-WDFN Exposed Pad
• Supplier Device Package: 8-WSON (4x4)

All substitute parts must match these parameters exactly to ensure functional and mechanical compatibility within existing designs.

Parameter Comparison

Engineering Selection Recommendations

The LM5109ASD/NOPB serves as the direct substitute for the discontinued LM5109ASD. Both parts are identical in electrical performance and mechanical specifications. The primary distinction is product status and regulatory compliance:

The LM5109ASD/NOPB is currently in active production status with ROHS3 compliance certification, whereas the original LM5109ASD is discontinued and RoHS non-compliant. For new designs or production continuity, the LM5109ASD/NOPB is the appropriate selection. The /NOPB suffix indicates lead-free plating and RoHS3 compliance, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the LM5109ASD/NOPB be used as a direct replacement for the LM5109ASD?

A: Yes. Both parts share identical electrical and mechanical specifications, including supply voltage range (8V ~ 14V), output current ratings (1A source/sink), package type (8-WSON 4x4), and thermal operating range (-40°C ~ 125°C). The LM5109ASD/NOPB is the active production equivalent.

Q: What does the /NOPB suffix indicate?

A: The /NOPB suffix denotes lead-free plating and RoHS3 compliance. This represents the current manufacturing standard for this device family.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the 8-WDFN Exposed Pad package with 8-WSON (4x4) supplier device package designation. Pinout and mechanical dimensions are identical.

Q: What is the significance of the product status difference?

A: The LM5109ASD is discontinued at DiGi Electronics, meaning it is no longer available through standard distribution channels. The LM5109ASD/NOPB maintains active production status and is the recommended part for procurement.

Q: Are there compliance or certification differences?

A: The LM5109ASD/NOPB carries ROHS3 compliance certification, while the original LM5109ASD is RoHS non-compliant. Both maintain REACH Unaffected status. For applications requiring RoHS compliance, the LM5109ASD/NOPB is the appropriate selection.