LM2937ET-15 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM2937ET-15 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 500mA output current with a fixed 15V output and operates across an input voltage range up to 26V. The part is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is essential for design continuity, long-term supply chain planning, and system maintenance where original inventory becomes unavailable.

Substiute Parts

LM2937ET-15

Texas InstrumentsIn Stock: 2363LM2937ET-15 Datasheet

Current PartRFQ

LM2937ET-15/NOPB

Texas InstrumentsIn Stock: 2216LM2937ET-15/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2937ET-15 is determined by strict equivalence across the following critical parameters:

• Output Voltage: Fixed 15V output
• Output Current Capability: 500mA minimum
• Input Voltage Range: Maximum 26V
• Voltage Dropout: 1V @ 500mA
• Package Type: TO-220-3 through-hole configuration
• Operating Temperature Range: -40°C ~ 125°C
• Protection Features: Mirror-Image Insertion, Over Temperature, Short Circuit, Transient Voltage
• Regulatory Compliance: ROHS3 Compliant, EAR99 classification

The LM2937ET-15/NOPB qualifies as a direct substitute based on identical electrical specifications and mechanical compatibility. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The LM2937ET-15/NOPB is the direct equivalent substitute for the LM2937ET-15. Both parts share identical electrical and mechanical specifications, including output voltage, current rating, input voltage range, dropout voltage, operating temperature range, and protection features. The primary advantage of selecting LM2937ET-15/NOPB is its Active product status, ensuring continued availability and supply chain reliability compared to the Last Time Buy status of the original part number.

Both variants maintain ROHS3 compliance and EAR99 export classification. The /NOPB designation indicates lead-free plating and represents the current manufacturing standard. Tube packaging of the substitute part is standard for active production components and does not affect electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can LM2937ET-15/NOPB be used as a direct replacement for LM2937ET-15?

A: Yes. Both parts are electrically and mechanically identical. They deliver the same 15V fixed output at 500mA, operate across the same input voltage range (up to 26V), and share identical dropout voltage, temperature range, and protection features. The /NOPB variant is the current production equivalent.

Q: What does the /NOPB suffix mean?

A: NOPB indicates "No Plumbum" (lead-free). This designation reflects the current manufacturing standard for RoHS3 compliance and does not affect device performance or compatibility.

Q: Are there packaging differences between these parts?

A: The LM2937ET-15/NOPB is supplied in Tube packaging, while the original LM2937ET-15 uses standard packaging. Both use the TO-220-3 through-hole package. Packaging format does not affect electrical performance or PCB mounting compatibility.

Q: Why is the original LM2937ET-15 marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued production. The LM2937ET-15/NOPB represents the active production equivalent and should be specified for new designs and long-term supply planning.

Q: Are both parts ROHS3 compliant?

A: Yes. Both LM2937ET-15 and LM2937ET-15/NOPB are ROHS3 compliant with MSL rating of 1 (Unlimited moisture sensitivity level).

Q: What is the maximum input voltage for these regulators?

A: The maximum input voltage is 26V for both parts. Design circuits accordingly to prevent overvoltage conditions.

Q: What protection features are included?

A: Both variants include Mirror-Image Insertion, Over Temperature, Short Circuit, and Transient Voltage protection.