LM5101BSD Half-Bridge Gate Driver IC Equivalent & Substitute Parts

Part Overview

The LM5101BSD 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 peak output currents of 2A (source) and 2A (sink). The LM5101BSD is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity.

The obsolete status of the LM5101BSD necessitates sourcing alternative components that maintain functional compatibility while meeting current manufacturing and compliance standards.

Substiute Parts

LM5101BSD

Texas InstrumentsIn Stock: 802LM5101BSD Datasheet

Current PartRFQ

ISL2111ARTZ

Renesas Electronics CorporationIn Stock: 9546ISL2111ARTZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM5101BSD is determined by the following critical parameters:

• Driven Configuration: Must be half-bridge
• Channel Type: Must be independent
• Number of Drivers: Must be 2
• Gate Type: Must be N-channel MOSFET
• Input Type: Must be non-inverting
• Supply Voltage Range: Must encompass or be compatible with 9V ~ 14V
• Peak Output Current: Must meet or exceed 2A source and 2A sink
• High Side Bootstrap Voltage: Must support minimum 118V operation
• Operating Temperature Range: Must cover -40°C ~ 125°C
• Package Type: Must be compatible with 10-WDFN Exposed Pad footprint

The ISL2111ARTZ from Renesas Electronics Corporation meets all substitution criteria while offering enhanced electrical performance and active product status.

Parameter Comparison

Engineering Selection Recommendations

The ISL2111ARTZ is the qualified substitute for the obsolete LM5101BSD based on the following factors:

Functional Compatibility: The ISL2111ARTZ maintains all critical functional parameters required for half-bridge gate driver operation, including configuration, channel independence, driver count, gate type, and input polarity.

Electrical Performance: The ISL2111ARTZ meets or exceeds the electrical specifications of the LM5101BSD. Peak output currents are higher (3A source, 4A sink versus 2A, 2A), and switching times are significantly faster (9ns/7.5ns rise/fall versus 570ns/430ns). The extended lower supply voltage range (8V minimum versus 9V) provides additional design flexibility.

Product Status and Compliance: The ISL2111ARTZ is an active product with ROHS3 compliance, addressing the obsolescence and compliance limitations of the LM5101BSD. This ensures long-term availability and alignment with current regulatory requirements.

Package Compatibility: Both devices use the 10-WDFN Exposed Pad package, enabling direct footprint compatibility in existing PCB designs.

Operational Considerations: The bootstrap voltage maximum of the ISL2111ARTZ (114V) is slightly lower than the LM5101BSD (118V). Applications operating near the upper bootstrap voltage limit should verify compatibility with the substitute part.

Frequently Asked Questions (FAQ)

Q: Can the ISL2111ARTZ be used as a direct replacement for the LM5101BSD in existing designs?

A: Yes, the ISL2111ARTZ is functionally compatible with the LM5101BSD for half-bridge gate driver applications. Both devices share the same package footprint (10-WDFN Exposed Pad), driven configuration, channel type, driver count, gate type, and input polarity. Verify that your application's bootstrap voltage requirement does not exceed 114V, as the ISL2111ARTZ has a slightly lower maximum bootstrap voltage than the LM5101BSD.

Q: What are the key differences between the LM5101BSD and ISL2111ARTZ?

A: The primary differences are product status, compliance, and electrical performance. The LM5101BSD is obsolete and RoHS non-compliant, while the ISL2111ARTZ is an active product with ROHS3 compliance. The ISL2111ARTZ provides higher peak output currents (3A/4A versus 2A/2A) and significantly faster switching times (9ns/7.5ns versus 570ns/430ns). The ISL2111ARTZ also extends the lower supply voltage range to 8V.

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

A: Both devices use the 10-WDFN Exposed Pad package with identical footprints, enabling direct PCB compatibility without layout modifications.

Q: What is the moisture sensitivity level difference, and does it affect handling?

A: The LM5101BSD has MSL 1 (unlimited shelf life), while the ISL2111ARTZ has MSL 2 (1-year shelf life). MSL 2 requires standard moisture control during storage and handling, including use of desiccant packaging and baking before reflow soldering if the device has been exposed to humidity.

Q: Why is the bootstrap voltage maximum lower on the ISL2111ARTZ?

A: The ISL2111ARTZ has a maximum bootstrap voltage of 114V compared to the LM5101BSD's 118V. This is a design characteristic of the Renesas device. Applications operating at bootstrap voltages above 114V should not use the ISL2111ARTZ as a substitute.

Q: Is the ISL2111ARTZ suitable for new designs?

A: Yes. The ISL2111ARTZ is an active product with current manufacturing support, ROHS3 compliance, and superior electrical performance characteristics. It is the recommended choice for new half-bridge gate driver applications requiring the specified functional parameters.