LM2940S-10 Equivalent & Substitute Parts

Part Overview

The LM2940S-10 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 10V output applications with 1A current capacity. This device operates in the Power Management (PMIC) category and is packaged in TO-263 (DDPAK-3) surface mount configuration. The main part number is currently in Last Time Buy status with 12,300 pieces available in inventory. Identifying equivalent and substitute parts is essential for design continuity, supply chain flexibility, and long-term product availability assurance.

Substiute Parts

LM2940S-10

Texas InstrumentsIn Stock: 12346LM2940S-10 Datasheet

Current PartRFQ

LM2940S-10/NOPB

Texas InstrumentsIn Stock: 1329LM2940S-10/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2940S-10 is determined by strict equivalence across the following critical parameters:

• Fixed output voltage of 10V
• Minimum 1A output current capability
• Maximum input voltage of 26V or greater
• Voltage dropout specification of 1V @ 1A or lower
• TO-263 (DDPAK-3) package configuration
• Surface mount mounting type
• Operating temperature range of -40°C to 125°C or wider
• Identical protection feature set: Over Current, Over Temperature, Reverse Polarity, Short Circuit
• ROHS3 compliance and equivalent environmental certifications

The LM2940S-10/NOPB variant qualifies as a direct substitute based on complete parameter alignment across all electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The LM2940S-10/NOPB is a direct functional equivalent to the LM2940S-10. Both parts maintain identical electrical specifications, package configuration, and protection characteristics. The primary distinction is product lifecycle status: the original LM2940S-10 is designated Last Time Buy, while the LM2940S-10/NOPB maintains Active status. Both parts carry ROHS3 compliance and equivalent environmental certifications (REACH Unaffected, ECCN EAR99). Selection between these variants should be based on supply chain availability and procurement timeline requirements.

Frequently Asked Questions (FAQ)

Q: Can LM2940S-10/NOPB be used as a direct replacement for LM2940S-10?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The /NOPB designation indicates lead-free plating and does not affect functional compatibility.

Q: What does the Last Time Buy status mean for the LM2940S-10?

A: Last Time Buy indicates the manufacturer will discontinue production after current inventory is depleted. The LM2940S-10/NOPB, with Active status, represents the ongoing production variant and is recommended for new designs and long-term supply assurance.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use the TO-263 (DDPAK-3) package configuration with identical mechanical specifications, ensuring PCB layout compatibility without modification.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both the LM2940S-10 and LM2940S-10/NOPB are ROHS3 compliant, REACH unaffected, and carry identical ECCN and HTSUS classifications.

Q: What is the significance of the /NOPB suffix?

A: The /NOPB suffix denotes lead-free plating (No Lead, Pb-free). This is a manufacturing variant that does not alter electrical performance or functional characteristics.