LM3544M-H/NOPB Equivalent & Substitute Parts

Part Overview

The LM3544M-H/NOPB is a Power Switch/Driver IC manufactured by Texas Instruments, designed for USB switching applications with 1:2 input-to-output ratio configuration. This component features N-Channel high-side output switching with 500mA maximum output current and integrated fault protection including current limiting, over-temperature, and UVLO (Under-Voltage Lock-Out) monitoring.

The LM3544M-H/NOPB carries an Obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Substiute Parts

LM3544M-H/NOPB

Texas InstrumentsIn Stock: 1210LM3544M-H/NOPB Datasheet

Current PartRFQ

LM3544M-L/NOPB

Texas InstrumentsIn Stock: 1628LM3544M-L/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM3544M-H/NOPB is determined by strict equivalence across the following critical parameters:

• Switch Type & Configuration: USB Switch with 1:2 input-to-output ratio, N-Channel high-side output topology
• Electrical Performance: 500mA maximum output current, 90mOhm typical on-resistance, 2.7V ~ 5.5V load voltage range
• Protection Features: Current limiting, over-temperature protection, and UVLO functionality
• Package Compatibility: 16-SOIC surface mount package with identical physical dimensions
• Environmental & Compliance: Operating temperature range -40°C ~ 125°C, ROHS3 compliance, MSL Level 1

The LM3544M-L/NOPB meets all these criteria and is classified as a direct substitute based on identical electrical specifications and package requirements.

Parameter Comparison

Engineering Selection Recommendations

The LM3544M-L/NOPB is the direct substitute for the obsolete LM3544M-H/NOPB. Both components are manufactured by Texas Instruments and share identical electrical specifications, package geometry, and protection features. The primary distinction is product status: the LM3544M-L/NOPB maintains Active status with confirmed inventory availability (1590 Pcs), whereas the LM3544M-H/NOPB is classified as Obsolete.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future applications. The LM3544M-L/NOPB is supplied in Tube packaging, consistent with standard distribution practices for active components.

For new designs or production continuity, the LM3544M-L/NOPB is the appropriate selection due to its active product status and ongoing manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the LM3544M-L/NOPB directly replace the LM3544M-H/NOPB without circuit modifications?

A: Yes. Both components are electrically and mechanically identical. The LM3544M-L/NOPB provides pin-for-pin compatibility with identical electrical performance across all specified parameters including output current, on-resistance, voltage ratings, and protection features.

Q: What is the difference between the LM3544M-H/NOPB and LM3544M-L/NOPB?

A: The components are functionally equivalent. The primary difference is product lifecycle status: LM3544M-H/NOPB is Obsolete, while LM3544M-L/NOPB is Active. The suffix designation (-H vs -L) reflects manufacturing or packaging variants, but electrical specifications remain identical.

Q: Are there any package or mounting differences?

A: Both components use the 16-SOIC surface mount package with identical physical dimensions (0.154" width, 3.90mm). PCB layout and assembly processes require no modification when substituting between these parts.

Q: What certifications and compliance standards apply to both parts?

A: Both the LM3544M-H/NOPB and LM3544M-L/NOPB are ROHS3 compliant, REACH unaffected, and classified as MSL Level 1 (Unlimited moisture sensitivity). Both carry EAR99 export classification.

Q: Is the LM3544M-L/NOPB available for immediate procurement?

A: The LM3544M-L/NOPB is listed as Active product status with 1590 Pcs in stock, indicating current availability through authorized distributors.