LM2937IMP-10 Equivalent & Substitute Parts

Part Overview

The LM2937IMP-10 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 10V output at 500mA with a maximum input voltage of 26V and dropout voltage of 1V at 500mA. The device is housed in a SOT-223-4 package and includes protection features for mirror-image insertion, over-temperature, short-circuit, and transient voltage conditions.

The LM2937IMP-10 carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production. This status necessitates identification of equivalent and substitute parts to ensure design continuity and supply chain reliability for applications currently utilizing this regulator.

Substiute Parts

LM2937IMP-10

Texas InstrumentsIn Stock: 2253LM2937IMP-10 Datasheet

Current PartRFQ

LM2937IMP-10/NOPB

Texas InstrumentsIn Stock: 1971LM2937IMP-10/NOPB Datasheet

DirectRFQ

LM2937IMPX-10/NOPB

National SemiconductorIn Stock: 4467LM2937IMPX-10/NOPB Datasheet

Parametric EquivalentRFQ

MCP1804T-A002I/DB

Microchip TechnologyIn Stock: 2224MCP1804T-A002I/DB Datasheet

MFR RecommendedRFQ

MIC5239-5.0YS

Microchip TechnologyIn Stock: 12780MIC5239-5.0YS Datasheet

MFR RecommendedRFQ

MIC5239-5.0YS-TR

Microchip TechnologyIn Stock: 2322MIC5239-5.0YS-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2937IMP-10 is determined by the following critical parameters:

• Output voltage: 10V fixed
• Maximum output current: 500mA minimum
• Maximum input voltage: 26V or higher
• Dropout voltage: 1V or lower at rated current
• Package type: SOT-223 surface mount
• Operating temperature range: -40°C to 85°C minimum
• Protection features: Over-temperature and short-circuit protection required

Substitute parts are grouped into three categories based on their relationship to the main part:

Direct Manufacturer Equivalent: Parts with identical electrical specifications, output voltage, and current ratings from the same manufacturer, differing only in packaging or product status designation.

Parametric Equivalent: Parts meeting all critical electrical parameters (output voltage, current, input voltage, dropout voltage) with identical package type and protection features, sourced from alternative manufacturers.

Manufacturer Recommended Alternative: Parts with modified specifications that remain functionally compatible within the allowed parameter ranges, offering enhanced performance characteristics or improved availability.

Parameter Comparison

Engineering Selection Recommendations

LM2937IMP-10/NOPB (Direct Equivalent): This part is the primary substitute for the LM2937IMP-10. It maintains identical electrical specifications, output voltage, current rating, and package configuration. The only distinction is product status: LM2937IMP-10/NOPB is Active, ensuring continued availability and supply chain stability. This part is recommended for direct replacement in all applications currently using the LM2937IMP-10. Both parts are ROHS3 compliant and carry identical protection features.

LM2937IMPX-10/NOPB (Parametric Equivalent): This part meets all critical electrical parameters and maintains the 10V output voltage and 500mA current rating. It is sourced from National Semiconductor and carries Active product status. The packaging differs (Bulk versus Cut Tape & Digi-Reel), which may affect procurement and handling procedures. This part is suitable for applications where packaging format flexibility is acceptable.

MCP1804T-A002I/DB (Manufacturer Recommended Alternative): This Microchip Technology regulator provides a 10V fixed output but with reduced current capability (150mA versus 500mA). It features improved quiescent current (115 µA versus 10 mA) and lower dropout voltage (0.95V @ 100mA). This part is suitable only for applications where output current requirements do not exceed 150mA. The SOT-223-3 package differs from the original SOT-223-4 configuration. This part is ROHS3 compliant and carries Active product status.

MIC5239-5.0YS and MIC5239-5.0YS-TR (Manufacturer Recommended Alternatives): These Microchip Technology regulators provide a 5V fixed output, differing from the original 10V specification. They maintain 500mA output current capability and feature superior quiescent current (45 µA) and dropout voltage (0.35V @ 500mA typical). These parts are suitable only for applications where a 5V output voltage is acceptable. Both variants are ROHS3 compliant with Active product status. The MIC5239-5.0YS-TR is packaged in Cut Tape & Digi-Reel format, while MIC5239-5.0YS is supplied in Tube packaging.

Frequently Asked Questions (FAQ)

Q: Can I use LM2937IMP-10/NOPB as a direct replacement for LM2937IMP-10?

A: Yes. The LM2937IMP-10/NOPB is a direct equivalent with identical electrical specifications, output voltage (10V), current rating (500mA), input voltage range (26V max), and dropout voltage (1V @ 500mA). The primary difference is product status: LM2937IMP-10/NOPB is Active, ensuring continued supply availability. Both parts are ROHS3 compliant and housed in SOT-223-4 packages.

Q: What is the difference between LM2937IMPX-10/NOPB and LM2937IMP-10/NOPB?

A: Both parts are parametric equivalents with identical electrical specifications. The LM2937IMPX-10/NOPB is sourced from National Semiconductor and supplied in Bulk packaging, while LM2937IMP-10/NOPB is from Texas Instruments in Cut Tape & Digi-Reel format. Electrical performance and package type (SOT-223-4) are identical.

Q: Can I substitute MCP1804T-A002I/DB for the LM2937IMP-10?

A: Substitution is possible only if your application requires 10V output at 150mA or less. The MCP1804T-A002I/DB provides 10V output but with reduced current capability (150mA maximum versus 500mA). It features lower quiescent current and dropout voltage. The package is SOT-223-3 (three pins) versus the original SOT-223-4 (four pins), requiring PCB layout verification.

Q: Why would I consider MIC5239-5.0YS or MIC5239-5.0YS-TR?

A: These parts are suitable only if your application can operate with 5V output instead of 10V. They offer superior performance characteristics: 500mA output current, lower quiescent current (45 µA), and lower dropout voltage (0.35V @ 500mA typical). Both are ROHS3 compliant with Active product status. The MIC5239-5.0YS-TR is available in Cut Tape & Digi-Reel packaging; MIC5239-5.0YS is supplied in Tube format.

Q: Are all substitute parts ROHS3 compliant?

A: LM2937IMP-10/NOPB, MCP1804T-A002I/DB, MIC5239-5.0YS, and MIC5239-5.0YS-TR are all ROHS3 compliant. LM2937IMPX-10/NOPB RoHS status is not specified in the provided data.

Q: What is the operating temperature range for each substitute?

A: LM2937IMP-10, LM2937IMP-10/NOPB, LM2937IMPX-10/NOPB, and MCP1804T-A002I/DB all operate from -40°C to 85°C. MIC5239-5.0YS and MIC5239-5.0YS-TR extend the upper limit to 125°C, providing enhanced thermal performance for high-temperature applications.

Q: What packaging formats are available for these substitutes?

A: LM2937IMP-10/NOPB and MIC5239-5.0YS-TR are supplied in Cut Tape & Digi-Reel format. LM2937IMPX-10/NOPB is supplied in Bulk. MCP1804T-A002I/DB is supplied in Tape & Reel. MIC5239-5.0YS is supplied in Tube. Verify packaging compatibility with your procurement and assembly processes.