LM2940LD-5.0 Equivalent & Substitute Parts

Part Overview

The LM2940LD-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 1A current capacity in an 8-WSON (4x4) surface mount package. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing production and maintenance applications. The part provides over current, over temperature, reverse polarity, and short circuit protection, making it suitable for regulated power supply designs requiring compact form factors and integrated protection features.

Substiute Parts

LM2940LD-5.0

Texas InstrumentsIn Stock: 3075LM2940LD-5.0 Datasheet

Current PartRFQ

LM2940LD-5.0/NOPB

Texas InstrumentsIn Stock: 2793LM2940LD-5.0/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2940LD-5.0 is determined by strict equivalence across the following critical parameters:

• Output voltage specification (5V fixed)
• Maximum input voltage rating (26V)
• Output current capacity (1A)
• Voltage dropout characteristics (1V @ 1A)
• Package type (8-WDFN Exposed Pad / 8-WSON 4x4)
• Protection feature set (Over Current, Over Temperature, Reverse Polarity, Short Circuit)
• Operating temperature range (-40°C ~ 125°C)
• Mounting configuration (Surface Mount)

The LM2940LD-5.0/NOPB qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction between these parts is product status and compliance certification, not functional or electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

The LM2940LD-5.0/NOPB is the direct functional equivalent of the LM2940LD-5.0. Both parts share identical electrical specifications, output characteristics, and package configuration. The LM2940LD-5.0/NOPB is preferred for new designs and ongoing production due to its Active product status and ROHS3 compliance certification. The original LM2940LD-5.0 is classified as Obsolete, indicating discontinued manufacturing and limited availability.

For applications requiring RoHS compliance or long-term supply chain stability, the LM2940LD-5.0/NOPB is the appropriate selection. The MSL rating difference (1 versus 3) reflects different manufacturing batches; the MSL 3 rating of the substitute part requires standard moisture control during storage and handling per IPC-A-610 guidelines.

Frequently Asked Questions (FAQ)

Q: Are the LM2940LD-5.0 and LM2940LD-5.0/NOPB electrically identical?

A: Yes. Both parts deliver identical electrical performance: 5V fixed output, 1A maximum output current, 26V maximum input voltage, and 1V maximum dropout at rated current. Protection features and operating temperature ranges are identical.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" designation indicates the part is supplied without lead (Pb) and meets RoHS3 compliance requirements. This is a packaging and compliance designation, not a functional modification.

Q: Can I use LM2940LD-5.0/NOPB in place of LM2940LD-5.0?

A: Yes, the LM2940LD-5.0/NOPB is a direct substitute. Pin configuration, package dimensions, and electrical specifications are identical. The substitute part is recommended for new applications due to Active product status and modern compliance certifications.

Q: Why is the original LM2940LD-5.0 marked as Obsolete?

A: Obsolete status indicates Texas Instruments has discontinued manufacturing. The LM2940LD-5.0/NOPB represents the current production equivalent with updated compliance standards.

Q: Are there any handling differences between these parts?

A: The LM2940LD-5.0/NOPB has MSL 3 rating (168 hours), requiring standard moisture control during storage. The original part has MSL 1 (Unlimited). Both require standard ESD precautions for surface mount components.

Q: What is the 8-WSON (4x4) package?

A: This is an 8-pin Wafer-Scale No-Lead package with 4mm × 4mm dimensions and an exposed thermal pad. Both parts use this identical package configuration, ensuring mechanical and thermal compatibility.