LM2931AD-5.0R2G Equivalent & Substitute Parts

Part Overview

The LM2931AD-5.0R2G is a linear voltage regulator IC from onsemi, classified as a Power Management (PMIC) component. This positive fixed output regulator delivers 100mA at 5V with a maximum dropout voltage of 0.6V at full load. The device is actively produced and widely stocked (27,800 pcs available), making it suitable for applications requiring stable 5V regulation in space-constrained surface mount designs. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or packaging preferences.

Substiute Parts

LM2931AD-5.0R2G

onsemiIn Stock: 27846LM2931AD-5.0R2G Datasheet

Current PartRFQ

LM2931AD50R

STMicroelectronicsIn Stock: 6444LM2931AD50R Datasheet

DirectRFQ

LM2931M-5.0/NOPB

Texas InstrumentsIn Stock: 8472LM2931M-5.0/NOPB Datasheet

SimilarRFQ

LM2931MX-5.0/NOPB

Texas InstrumentsIn Stock: 10275LM2931MX-5.0/NOPB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2931AD-5.0R2G is determined by the following critical parameters:

• Output voltage specification: 5V fixed
• Output current capability: 100mA minimum
• Input voltage tolerance: 26V maximum
• Package type: 8-SOIC form factor
• Mounting type: Surface mount
• Operating temperature range: -40°C to 125°C minimum
• Regulatory compliance: ROHS3 and REACH requirements

All identified substitute parts maintain these core electrical and mechanical specifications. Variations in dropout voltage, quiescent current, PSRR, and specific protection feature implementations do not prevent functional substitution when the above parameters are met.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status and full ROHS3 compliance, ensuring long-term availability and regulatory alignment with the original LM2931AD-5.0R2G.

LM2931AD50R (STMicroelectronics): Direct electrical equivalent with identical dropout voltage specification (0.6V @ 100mA) and maximum supply current (30mA). Maintains the same operating temperature range (-40°C ~ 125°C). Suitable for direct replacement in applications where the original onsemi part is unavailable.

LM2931M-5.0/NOPB (Texas Instruments): Offers improved performance characteristics with lower dropout voltage (0.3V @ 100mA) and reduced supply current (15mA). Operating temperature range is limited to -40°C ~ 85°C. Packaging is supplied in tube format rather than cut tape. Select this variant when lower power dissipation is beneficial and the reduced temperature range is acceptable for the application.

LM2931MX-5.0/NOPB (Texas Instruments): Functionally identical to the LM2931M-5.0/NOPB with improved dropout voltage and supply current specifications. Supplied in cut tape format, matching the original part's packaging preference. Operating temperature range is -40°C ~ 85°C. This variant provides the best balance of performance and packaging compatibility.

Frequently Asked Questions (FAQ)

Q: Can LM2931M-5.0/NOPB and LM2931MX-5.0/NOPB be used interchangeably with the LM2931AD-5.0R2G?

A: Yes, both Texas Instruments variants are electrically compatible substitutes. The primary difference is packaging format: LM2931M-5.0/NOPB is supplied in tube packaging, while LM2931MX-5.0/NOPB is supplied in cut tape format. Both maintain the same 8-SOIC package footprint and electrical performance. Verify that your application's operating temperature requirement does not exceed 85°C, as these variants have a lower maximum operating temperature than the original part.

Q: What is the impact of different dropout voltage specifications?

A: The LM2931AD-5.0R2G and LM2931AD50R specify 0.6V dropout voltage, while the Texas Instruments variants (LM2931M-5.0/NOPB and LM2931MX-5.0/NOPB) specify 0.3V. Lower dropout voltage reduces power dissipation in the regulator and allows operation with lower input voltages. If your circuit operates with tight input voltage margins, the lower dropout voltage of the Texas Instruments parts provides additional headroom.

Q: Are there packaging considerations when substituting these parts?

A: All parts use the 8-SOIC package with identical 0.154" (3.90mm) width. The onsemi and STMicroelectronics variants are supplied in cut tape and Digi-Reel format, suitable for automated assembly. The Texas Instruments LM2931M-5.0/NOPB is supplied in tube format, which may require manual handling or reel conversion. The LM2931MX-5.0/NOPB maintains cut tape packaging, eliminating this consideration.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All listed parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8542.39.0001. Moisture sensitivity level is 1 (unlimited) for all variants, indicating no special storage or handling requirements.

Q: What protection features differ between the main part and substitutes?

A: The LM2931AD-5.0R2G provides over current and over temperature protection. The STMicroelectronics LM2931AD50R provides current limit and thermal shutdown. The Texas Instruments variants (LM2931M-5.0/NOPB and LM2931MX-5.0/NOPB) provide over temperature, reverse polarity, and short circuit protection. All variants include thermal protection; the specific implementation differs by manufacturer but provides equivalent functional safety.