LM3544M-L Equivalent & Substitute Parts

Part Overview

The LM3544M-L is a Power Management IC (PMIC) classified as a Power Switch/Driver with 1:2 N-Channel configuration, rated for 500mA output current. This component is designed for USB switching applications with high-side output configuration and integrated fault protection including current limiting, over-temperature, and UVLO (Under-Voltage Lock-Out) functions.

The LM3544M-L carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

LM3544M-L

Texas InstrumentsIn Stock: 2118LM3544M-L Datasheet

Current PartRFQ

LM3544M-L/NOPB

Texas InstrumentsIn Stock: 1628LM3544M-L/NOPB Datasheet

DirectRFQ

LM3544MX-L/NOPB

Texas InstrumentsIn Stock: 5159LM3544MX-L/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM3544M-L is determined by strict equivalence across the following critical parameters:

• Switch Type: USB Switch
• Number of Outputs: 4
• Ratio - Input:Output: 1:2
• Output Configuration: High Side
• Output Type: N-Channel
• Interface: On/Off
• Voltage - Load: 2.7V ~ 5.5V
• Current - Output (Max): 500mA
• Rds On (Typ): 90mOhm
• Input Type: Non-Inverting
• Features: Status Flag
• Fault Protection: Current Limiting (Fixed), Over Temperature, UVLO
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

All identified substitute parts maintain identical electrical specifications and mechanical compatibility. Variations in product status, packaging format (Tube vs. Tape & Reel), and operating temperature range do not affect functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both LM3544M-L/NOPB and LM3544MX-L/NOPB are functionally equivalent substitutes for the obsolete LM3544M-L. Selection between these alternatives is based on supply chain availability, packaging requirements, and operational temperature specifications.

LM3544M-L/NOPB carries Active product status and is supplied in Tube packaging, suitable for lower-volume applications and manual assembly processes. This part maintains the full operating temperature range of -40°C to 125°C (junction temperature).

LM3544MX-L/NOPB is the manufacturer-recommended substitute, also carrying Active product status and supplied in Tape & Reel format for automated assembly and high-volume production. This variant specifies an operating temperature range of -40°C to 85°C (ambient temperature). The difference in temperature specification reflects standard industrial practice for tape-and-reel packaged components and does not affect functional compatibility in typical USB switching applications.

Both parts maintain identical electrical characteristics, fault protection mechanisms, and regulatory compliance (ROHS3, REACH Unaffected). Selection should prioritize availability and packaging compatibility with existing assembly infrastructure.

Frequently Asked Questions (FAQ)

Q: Can LM3544M-L/NOPB and LM3544MX-L/NOPB be used interchangeably with the LM3544M-L?

A: Yes. Both parts are functionally equivalent substitutes. All three components share identical electrical specifications, output configuration, current ratings, and fault protection features. The primary differences are product status (Active vs. Obsolete) and packaging format (Tube vs. Tape & Reel).

Q: What is the difference between the operating temperature ranges specified for LM3544M-L/NOPB and LM3544MX-L/NOPB?

A: LM3544M-L/NOPB specifies -40°C to 125°C (junction temperature), while LM3544MX-L/NOPB specifies -40°C to 85°C (ambient temperature). These represent different measurement methodologies standard to their respective packaging formats. For typical USB switching applications operating within standard ambient conditions, both parts are suitable.

Q: Does packaging format affect electrical performance?

A: No. Tube and Tape & Reel packaging formats do not alter the electrical characteristics or performance of the component. Packaging selection is driven by assembly process requirements, volume considerations, and supply chain logistics.

Q: Are all three parts RoHS compliant?

A: Yes. LM3544M-L, LM3544M-L/NOPB, and LM3544MX-L/NOPB are all ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited).

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

A: For new designs, LM3544MX-L/NOPB is the manufacturer-recommended choice, as it carries Active product status and is optimized for automated assembly via Tape & Reel packaging. LM3544M-L/NOPB is suitable for applications requiring Tube packaging or lower-volume production.