LM2931AS-5.0 Equivalent & Substitute Parts

Part Overview

The LM2931AS-5.0 is a linear voltage regulator IC from Texas Instruments, delivering a fixed positive 5V output at 100mA in a TO-263 (DDPAK-3) surface mount package. This device is classified as Last Time Buy, indicating end-of-life status. Finding equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring 5V regulation in compact form factors.

Substiute Parts

LM2931AS-5.0

Texas InstrumentsIn Stock: 2704LM2931AS-5.0 Datasheet

Current PartRFQ

LM2931AS-5.0/NOPB

National SemiconductorIn Stock: 2266LM2931AS-5.0/NOPB Datasheet

DirectRFQ

LM2931S-5.0/NOPB

Texas InstrumentsIn Stock: 1756LM2931S-5.0/NOPB Datasheet

Parametric EquivalentRFQ

MIC29310-5.0WU

Microchip TechnologyIn Stock: 1444MIC29310-5.0WU Datasheet

MFR RecommendedRFQ

MIC29310-5.0WU-TR

Microchip TechnologyIn Stock: 1234MIC29310-5.0WU-TR Datasheet

MFR RecommendedRFQ

MIC5237-5.0YU

Microchip TechnologyIn Stock: 12202MIC5237-5.0YU Datasheet

MFR RecommendedRFQ

MIC5237-5.0YU-TR

Microchip TechnologyIn Stock: 692MIC5237-5.0YU-TR Datasheet

MFR RecommendedRFQ

TLE42744GV50ATMA1

Infineon TechnologiesIn Stock: 2086TLE42744GV50ATMA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2931AS-5.0 is determined by the following critical parameters:

• Fixed 5V output voltage
• Output current capability (minimum 100mA required for direct substitution)
• TO-263 package compatibility
• Input voltage rating (minimum 26V or higher)
• Dropout voltage performance
• Protection features (thermal, reverse polarity, short circuit)
• Operating temperature range (-40°C to 85°C minimum)
• RoHS3 compliance and MSL rating

Substitute parts are grouped into three categories based on output current capacity and performance characteristics:

Direct Equivalents (100mA class): Parts with identical or superior electrical specifications and 100mA output rating, maintaining pin-for-pin compatibility.

Higher Current Alternatives (500mA–3A class): Parts with increased output current capability, suitable for applications requiring additional headroom or future design scaling.

Automotive-Grade Alternative: Parts with extended temperature range and automotive qualification, suitable for demanding environments.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (100mA Applications):

LM2931AS-5.0/NOPB from National Semiconductor is the primary direct equivalent, maintaining identical electrical specifications and Active product status. LM2931S-5.0/NOPB from Texas Instruments offers superior quiescent current performance (1mA vs. 15mA), reducing standby power consumption while maintaining all other critical parameters.

For Applications Requiring Higher Current Capacity:

MIC5237-5.0YU and MIC5237-5.0YU-TR from Microchip Technology provide 500mA output capability with extended operating temperature range (-40°C to 125°C). These parts are suitable for designs requiring additional current headroom or thermal margin. Note that input voltage rating is reduced to 16V maximum.

MIC29310-5.0WU and MIC29310-5.0WU-TR deliver 3A output current for applications requiring significant current scaling. Operating temperature range is 0°C to 125°C, limiting use in extended low-temperature environments.

For Automotive and High-Reliability Applications:

TLE42744GV50ATMA1 from Infineon Technologies is AEC-Q100 qualified with automotive-grade specifications, including extended operating temperature range (-40°C to 150°C) and highest input voltage rating (40V). This part is suitable for automotive and industrial applications requiring enhanced reliability and thermal performance.

All recommended substitutes maintain RoHS3 compliance and MSL-3 moisture sensitivity rating, ensuring compatibility with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can LM2931S-5.0/NOPB directly replace LM2931AS-5.0 in existing designs?

A: Yes. LM2931S-5.0/NOPB maintains identical output voltage, current rating, input voltage range, dropout voltage, and package. The primary difference is reduced quiescent current (1mA vs. 15mA), which improves standby power efficiency without affecting circuit operation.

Q: What is the key limitation when substituting with MIC5237 or MIC29310 series?

A: Input voltage rating is reduced from 26V to 16V maximum. Applications operating above 16V input voltage cannot use these substitutes. Additionally, MIC29310 series has a narrower operating temperature range (0°C to 125°C vs. -40°C to 85°C), limiting use in extended low-temperature environments.

Q: Is TLE42744GV50ATMA1 suitable for non-automotive applications?

A: Yes. TLE42744GV50ATMA1 exceeds the electrical specifications of LM2931AS-5.0 and is suitable for any application requiring 5V regulation. Automotive qualification provides additional reliability assurance but does not restrict use in general industrial or consumer applications.

Q: Are packaging differences between tube and tape & reel significant?

A: Packaging format (tube vs. tape & reel) affects handling and assembly processes but does not impact electrical performance or compatibility. Tape & reel packaging is optimized for automated assembly, while tube packaging is suitable for manual handling and lower-volume applications.

Q: What is the impact of higher quiescent current in MIC29310 series?

A: MIC29310 series has 20mA quiescent current compared to 15mA in LM2931AS-5.0. In battery-powered or low-power standby applications, this 5mA difference may be significant. For line-powered applications, this difference is negligible.

Q: Can I use MIC5237-5.0YU in applications with input voltage above 16V?

A: No. MIC5237-5.0YU is rated for maximum 16V input. Using this part with input voltages exceeding 16V will exceed device ratings and may cause failure. Verify input voltage range in your application before substitution.