LM3310SQ Equivalent & Substitute Parts

Part Overview

The LM3310SQ is a boost switching regulator IC from Texas Instruments designed for step-up voltage conversion applications. It delivers positive adjustable output from 1.263V to 20V with 2A switch current capability in a 24-WFQFN surface mount package. The main part number LM3310SQ is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The LM3310SQ/NOPB variant provides direct functional equivalence with active product status and improved compliance characteristics.

Substiute Parts

LM3310SQ

Texas InstrumentsIn Stock: 9329LM3310SQ Datasheet

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LM3310SQ/NOPB

Texas InstrumentsIn Stock: 15574LM3310SQ/NOPB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The LM3310SQ/NOPB is a direct substitute for the LM3310SQ based on identical electrical and mechanical specifications. Substitution eligibility is determined by the following critical parameters:

• Input voltage range: 2.5V to 7V
• Output voltage range: 1.263V to 20V
• Output current capability: 2A (Switch)
• Switching frequency: 660kHz, 1.28MHz
• Package type: 24-WFQFN Exposed Pad
• Operating temperature range: -40°C to 125°C (TJ)
• Synchronous rectifier: Not present
• Number of outputs: Single output

The LM3310SQ/NOPB maintains all electrical performance characteristics and physical form factor compatibility with the original LM3310SQ, enabling direct board-level substitution.

Parameter Comparison

Engineering Selection Recommendations

The LM3310SQ/NOPB is the appropriate selection for new designs and production applications. While the original LM3310SQ remains functionally equivalent, its obsolete status and non-compliant RoHS classification present supply chain and regulatory constraints. The LM3310SQ/NOPB maintains identical electrical performance and physical compatibility while offering active product status and ROHS3 compliance. The Tape & Reel packaging format of the LM3310SQ/NOPB is standard for automated assembly processes. Both parts share identical REACH and ECCN classifications, ensuring consistent export and regulatory treatment.

Frequently Asked Questions (FAQ)

Q: Can LM3310SQ/NOPB be used as a direct replacement for LM3310SQ?

A: Yes. The LM3310SQ/NOPB is electrically and mechanically identical to the LM3310SQ. All electrical parameters, switching characteristics, output voltage range, current ratings, and thermal specifications are equivalent. The 24-WFQFN package footprint is identical, enabling direct board-level substitution without design modifications.

Q: What is the difference between LM3310SQ and LM3310SQ/NOPB?

A: The primary differences are product status and compliance. The LM3310SQ is obsolete with RoHS non-compliant classification, while the LM3310SQ/NOPB is active with ROHS3 compliance. Packaging format differs: LM3310SQ is supplied in bulk, while LM3310SQ/NOPB is supplied in Tape & Reel format. Electrical and functional specifications are identical.

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

A: No. Both parts operate across the identical temperature range of -40°C to 125°C (TJ) and deliver the same switching frequency options (660kHz, 1.28MHz), output current (2A), and voltage regulation characteristics.

Q: What packaging considerations apply to the LM3310SQ/NOPB?

A: The LM3310SQ/NOPB is supplied in Tape & Reel (TR) format, which is standard for automated pick-and-place assembly. The 24-WQFN (4x4) package dimensions and pin configuration are identical to the original LM3310SQ, requiring no PCB layout modifications.

Q: Does the LM3310SQ/NOPB meet current regulatory requirements?

A: Yes. The LM3310SQ/NOPB is ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic components in most jurisdictions. The original LM3310SQ is RoHS non-compliant and may face restrictions in certain applications and regions.