LM5109AMA Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5109AMA 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 LM5109AMA is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity.

Substiute Parts

LM5109AMA

Texas InstrumentsIn Stock: 1318LM5109AMA Datasheet

Current PartRFQ

LM5109AMA/NOPB

Texas InstrumentsIn Stock: 1064LM5109AMA/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM5109AMA is determined by strict equivalence across the following critical 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
• High Side Voltage - Max (Bootstrap): 108 V
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Operating Temperature: -40°C ~ 125°C (TJ)

The LM5109AMA/NOPB is a direct substitute, maintaining identical electrical specifications and package configuration while offering improved compliance status.

Parameter Comparison

Engineering Selection Recommendations

The LM5109AMA/NOPB is the direct functional equivalent of the LM5109AMA. Both parts maintain identical electrical and mechanical specifications across all critical parameters. The primary distinction lies in product status and regulatory compliance: the LM5109AMA/NOPB carries Last Time Buy status and achieves ROHS3 compliance, whereas the original LM5109AMA is obsolete and RoHS non-compliant. For new designs or production continuity, the LM5109AMA/NOPB is the appropriate selection. Both parts are supplied in 8-SOIC surface-mount packages with identical pinout and thermal characteristics.

Frequently Asked Questions (FAQ)

Q: Can the LM5109AMA/NOPB be used as a direct replacement for the LM5109AMA?

A: Yes. The LM5109AMA/NOPB is electrically and mechanically identical to the LM5109AMA across all specified parameters, including supply voltage, output current, timing characteristics, and package configuration. No circuit modifications are required.

Q: What is the difference between the LM5109AMA and LM5109AMA/NOPB?

A: The primary differences are product status and compliance certification. The LM5109AMA/NOPB is designated Last Time Buy with ROHS3 compliance, while the LM5109AMA is obsolete and RoHS non-compliant. Electrical performance and package specifications are identical.

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

A: No. Both the LM5109AMA and LM5109AMA/NOPB use the 8-SOIC package with identical pinout, dimensions (0.154" width, 3.90mm), and mounting type (surface mount).

Q: What supply voltage range does the LM5109AMA support?

A: The LM5109AMA operates with a supply voltage range of 8V to 14V, with logic input thresholds of 0.8V (VIL) and 2.2V (VIH).

Q: What is the maximum bootstrap voltage for the LM5109AMA?

A: The maximum high-side bootstrap voltage is 108V, enabling operation in half-bridge topologies with high-voltage switching applications.