LM5101AMX Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5101AMX is a half-bridge gate driver IC manufactured by Texas Instruments, designed for driving N-channel MOSFETs in half-bridge configurations. This device is classified as obsolete, which necessitates identification of active equivalent and substitute parts for new designs and production continuity. The LM5101AMX operates with a supply voltage range of 9V to 14V and delivers peak output currents of 3A for both source and sink operations, making it suitable for moderate-power switching applications.

Substiute Parts

LM5101AMX

Texas InstrumentsIn Stock: 17961LM5101AMX Datasheet

Current PartRFQ

LM5101AMX/NOPB

Texas InstrumentsIn Stock: 30354LM5101AMX/NOPB Datasheet

DirectRFQ

ISL2111ABZ

Renesas Electronics CorporationIn Stock: 1360ISL2111ABZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM5101AMX is determined by strict equivalence in the following critical parameters:

• Driven Configuration: Half-Bridge topology
• Number of Drivers: 2 independent channels
• Gate Type: N-Channel MOSFET driving capability
• Input Type: Non-Inverting logic
• Package / Case: 8-SOIC form factor with identical pin pitch and dimensions
• Operating Temperature Range: -40°C to 125°C minimum
• Mounting Type: Surface Mount

Substitute parts must maintain compatibility within the specified supply voltage range and deliver equivalent or superior peak output current performance. Bootstrap voltage capability and rise/fall time characteristics are secondary parameters that may vary within acceptable design margins.

Parameter Comparison

Engineering Selection Recommendations

LM5101AMX/NOPB is the direct equivalent substitute for the obsolete LM5101AMX. Both parts are manufactured by Texas Instruments and share identical electrical specifications, pin configuration, and package dimensions. The primary distinction is product status: LM5101AMX/NOPB is active and ROHS3 compliant, whereas the original LM5101AMX is obsolete and RoHS non-compliant. This part is recommended for designs requiring exact functional replacement with improved compliance status.

ISL2111ABZ (Renesas Electronics Corporation) is a manufacturer-recommended alternative that maintains functional equivalence across all critical parameters. The ISL2111ABZ operates within a slightly extended supply voltage range (8V ~ 14V versus 9V ~ 14V) and delivers superior peak sink current (4A versus 3A). Rise and fall times are significantly faster (9ns/7.5ns versus 430ns/260ns), which may provide performance advantages in high-frequency switching applications. Logic voltage thresholds differ slightly (1.4V/2.2V versus 2.3V/-), and bootstrap voltage is marginally lower (114V versus 118V). Both substitute parts are ROHS3 compliant and REACH unaffected.

Frequently Asked Questions (FAQ)

Q: Can LM5101AMX/NOPB be used as a direct replacement for LM5101AMX?

A: Yes. LM5101AMX/NOPB is electrically and mechanically identical to LM5101AMX. Both share the same pin configuration, package dimensions (8-SOIC), and electrical specifications. The primary advantage of LM5101AMX/NOPB is active product status and ROHS3 compliance.

Q: What are the key differences between LM5101AMX and ISL2111ABZ?

A: Both devices are half-bridge gate drivers with identical topology and package form factor. ISL2111ABZ offers faster switching times (9ns/7.5ns rise/fall versus 430ns/260ns), extended lower supply voltage limit (8V minimum versus 9V), and higher sink current capability (4A versus 3A). Logic voltage thresholds and bootstrap voltage specifications differ slightly. These differences are within acceptable design margins for most applications.

Q: Are all substitute parts available in the same package?

A: Yes. LM5101AMX, LM5101AMX/NOPB, and ISL2111ABZ are all supplied in 8-SOIC surface-mount packages with identical pin pitch and dimensions (0.154", 3.90mm width). Packaging options differ: LM5101AMX/NOPB is available in Cut Tape and Digi-Reel formats, while ISL2111ABZ is supplied in Tube packaging.

Q: Which substitute part should be selected for new designs?

A: LM5101AMX/NOPB is recommended for designs requiring exact functional equivalence with improved compliance. ISL2111ABZ is recommended when faster switching performance or extended supply voltage range provides design advantages. Both parts are active and ROHS3 compliant.

Q: Are there any compatibility concerns with PCB layout or thermal management?

A: No compatibility concerns exist. All three parts share identical package dimensions and pin configurations, requiring no PCB layout modifications. Thermal characteristics are equivalent across all parts.