LM2940S-9.0 Equivalent & Substitute Parts

Part Overview

The LM2940S-9.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 9V output at 1A current capacity in a TO-263 (DDPAK-3) surface mount package. This device provides regulated power supply functionality with integrated protection features including over-current, over-temperature, reverse polarity, and short-circuit protection.

The main part number LM2940S-9.0 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and current compliance certifications.

Substiute Parts

LM2940S-9.0

Texas InstrumentsIn Stock: 3477LM2940S-9.0 Datasheet

Current PartRFQ

LM2940S-9.0/NOPB

Texas InstrumentsIn Stock: 1111LM2940S-9.0/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2940S-9.0 is determined by strict equivalence across the following critical parameters:

• Fixed output voltage of 9V
• Output current rating of 1A
• Maximum input voltage of 26V
• Voltage dropout specification of 1V @ 1A
• Quiescent current of 10 mA
• PSRR of 64dB (120Hz)
• Operating temperature range of -40°C to 125°C
• TO-263 (DDPAK-3) package configuration
• Identical protection feature set

Parts meeting all these criteria are classified as direct functional equivalents and may be substituted without circuit redesign or performance degradation.

Parameter Comparison

Engineering Selection Recommendations

The LM2940S-9.0/NOPB is the direct equivalent substitute for the LM2940S-9.0. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications across all critical parameters.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The LM2940S-9.0 carries obsolete status with RoHS non-compliant certification, while the LM2940S-9.0/NOPB maintains active product status with ROHS3 compliance. For new designs or applications requiring current regulatory compliance, the LM2940S-9.0/NOPB is the appropriate selection. For legacy system maintenance where the original part number must be preserved, the LM2940S-9.0 remains functionally equivalent.

Both parts are supplied in TO-263 (DDPAK-3) surface mount packages with identical pinout and thermal characteristics. No circuit modifications are required when substituting between these part numbers.

Frequently Asked Questions (FAQ)

Q: Can LM2940S-9.0/NOPB be used as a direct replacement for LM2940S-9.0?

A: Yes. Both parts are manufactured by Texas Instruments with identical electrical specifications, output voltage, current rating, dropout voltage, quiescent current, PSRR, operating temperature range, and protection features. The TO-263 (DDPAK-3) package pinout is identical. No circuit redesign is required.

Q: What is the difference between LM2940S-9.0 and LM2940S-9.0/NOPB?

A: The primary differences are product status and compliance certification. LM2940S-9.0 is obsolete and RoHS non-compliant. LM2940S-9.0/NOPB is active and ROHS3 compliant. Electrical and mechanical specifications are identical.

Q: Why is the LM2940S-9.0 marked as obsolete?

A: Product obsolescence is determined by the manufacturer based on market demand and production lifecycle. The LM2940S-9.0/NOPB variant remains in active production and is the recommended selection for new applications.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the TO-263 (DDPAK-3) package with identical pinout configuration. They are mechanically and electrically interchangeable.

Q: What compliance certifications apply to each part?

A: LM2940S-9.0 is RoHS non-compliant. LM2940S-9.0/NOPB is ROHS3 compliant. Both parts are REACH unaffected and classified under ECCN EAR99.