LM2940IMP-15 Equivalent & Substitute Parts

Part Overview

The LM2940IMP-15 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. It delivers 1A output current at a fixed 15V output with a maximum dropout voltage of 1V at full load. The device integrates protection features including over-current, over-temperature, reverse polarity, and short-circuit protection, making it suitable for regulated power supply applications requiring stable 15V output in space-constrained surface-mount designs.

The LM2940IMP-15 carries a Last Time Buy product status, indicating that new production has ceased. This status necessitates identification of equivalent substitute parts to ensure design continuity and procurement availability for ongoing production requirements.

Substiute Parts

LM2940IMP-15

Texas InstrumentsIn Stock: 3869LM2940IMP-15 Datasheet

Current PartRFQ

LM2940IMP-15/NOPB

Texas InstrumentsIn Stock: 3472LM2940IMP-15/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2940IMP-15 is determined by strict equivalence across the following critical parameters:

• Output Voltage: Fixed 15V output is mandatory; no voltage variation is acceptable
• Output Current Capability: Minimum 1A continuous output current required
• Package Type: SOT-223-4 surface-mount package ensures mechanical and thermal compatibility
• Protection Features: All four protection mechanisms (over-current, over-temperature, reverse polarity, short-circuit) must be present
• Operating Temperature Range: Full -40°C to 85°C range must be supported
• Electrical Specifications: Maximum input voltage of 26V, dropout voltage of 1V @ 1A, and quiescent current of 10 mA define the functional envelope
• Compliance Standards: RoHS3 compliance and MSL Level 1 rating are required for manufacturing and supply chain compatibility

The LM2940IMP-15/NOPB qualifies as a parametric equivalent based on identical electrical specifications and package designation, with the primary distinction being packaging format (Tape & Reel versus Cut Tape & Digi-Reel).

Parameter Comparison

Engineering Selection Recommendations

The LM2940IMP-15/NOPB is the direct parametric equivalent for the LM2940IMP-15. All electrical characteristics, thermal performance, protection mechanisms, and package specifications are identical. The distinction between these parts is limited to packaging format and product lifecycle status.

Product Status Consideration: The LM2940IMP-15 is designated Last Time Buy, indicating cessation of new production. The LM2940IMP-15/NOPB maintains Active product status with Texas Instruments, ensuring continued availability and supply chain support for new designs and ongoing production requirements.

Packaging Format: The LM2940IMP-15 is supplied in Tape & Reel format, while the LM2940IMP-15/NOPB is available in Cut Tape and Digi-Reel formats. Both formats contain identical die and lead configurations; the difference is in the carrier medium used for automated assembly processes. Selection between these formats depends on production equipment compatibility and order quantity requirements.

Compliance and Certifications: Both parts maintain identical RoHS3 compliance, MSL Level 1 rating, REACH Unaffected status, and ECCN/HTSUS classifications, ensuring regulatory and supply chain compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LM2940IMP-15/NOPB be used as a direct replacement for the LM2940IMP-15?

A: Yes. The LM2940IMP-15/NOPB is a parametric equivalent with identical electrical specifications, output voltage, current rating, protection features, and SOT-223-4 package configuration. The only differences are packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and product lifecycle status (Last Time Buy versus Active).

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

A: The "/NOPB" suffix designates that the part is supplied without lead-free plating on the leads. This is a packaging and finish designation that does not affect electrical performance or RoHS compliance status.

Q: Are there any thermal or electrical performance differences between these parts?

A: No. Both parts have identical maximum input voltage (26V), fixed output voltage (15V), output current (1A), dropout voltage (1V @ 1A), quiescent current (10 mA), and operating temperature range (-40°C to 85°C). Thermal performance and electrical characteristics are equivalent.

Q: Which packaging format should I select for new production?

A: Selection depends on your assembly equipment and order volume. Tape & Reel format is optimized for high-volume automated pick-and-place assembly. Cut Tape and Digi-Reel formats are suitable for lower volumes or equipment with different feeder compatibility. Consult your manufacturing partner regarding equipment specifications.

Q: Is the LM2940IMP-15/NOPB suitable for designs currently using the LM2940IMP-15?

A: Yes. The LM2940IMP-15/NOPB is suitable for all applications currently using the LM2940IMP-15. No circuit modifications, PCB layout changes, or design validation are required due to the parametric equivalence of these parts.

Q: What is the MSL Level 1 rating, and why is it important?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture bake-out requirements. Both parts carry this rating, meaning they can be stored and handled under standard conditions without special moisture control procedures, simplifying supply chain management and inventory handling.