MPQ2451DT-LF-P Equivalent & Substitute Parts

Part Overview

The MPQ2451DT-LF-P is a buck switching regulator IC manufactured by Monolithic Power Systems Inc., designed for step-down voltage conversion with positive adjustable output. It delivers 600mA output current across an input voltage range of 3.3V to 36V, with adjustable output voltage from 0.8V to 32.4V. The device operates at 2MHz switching frequency in a SOT-23-6 surface mount package.

The MPQ2451DT-LF-P carries a "Not For New Designs" product status, indicating it has been superseded or is in end-of-life phase. Identifying equivalent substitute parts is necessary for design continuity, inventory management, and ensuring long-term component availability for existing applications.

Substiute Parts

MPQ2451DT-LF-P

Monolithic Power Systems Inc.In Stock: 743MPQ2451DT-LF-P Datasheet

Current PartRFQ

MPQ2451DJ-LF-Z

Monolithic Power Systems Inc.In Stock: 1077MPQ2451DJ-LF-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPQ2451DT-LF-P is determined by the following critical parameters:

• Functional equivalence: Step-down buck topology with positive adjustable output
• Electrical specifications: Input voltage range 3.3V–36V, output voltage 0.8V–32.4V, 600mA output current, 2MHz switching frequency
• Package compatibility: SOT-23-6 surface mount package
• Compliance and certifications: ROHS3 compliance, MSL Level 1, REACH unaffected status
• Manufacturer continuity: Same manufacturer (Monolithic Power Systems Inc.) ensures design and application compatibility

The MPQ2451DJ-LF-Z qualifies as a direct substitute based on these parameters. It maintains identical electrical specifications and functional characteristics while offering an active product status, making it suitable for new designs and long-term availability.

Parameter Comparison

Engineering Selection Recommendations

The MPQ2451DJ-LF-Z is the recommended substitute for the MPQ2451DT-LF-P based on the following engineering criteria:

Compliance and Regulatory Status: Both parts maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status, ensuring regulatory continuity across applications.

Product Lifecycle: The MPQ2451DJ-LF-Z carries an "Active" product status, providing assurance of ongoing manufacturer support, availability, and long-term supply chain stability. The MPQ2451DT-LF-P's "Not For New Designs" status indicates end-of-life phase, making the substitute necessary for design continuity.

Electrical and Functional Equivalence: Both devices share identical electrical specifications—input voltage range, output voltage range, output current capacity, and switching frequency—ensuring drop-in compatibility at the circuit level.

Package Consideration: The MPQ2451DJ-LF-Z uses a thin SOT-23-6 (TSOT-23-6) package variant. While mechanically compatible with standard SOT-23-6 footprints, the reduced height may require verification of PCB assembly clearances in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the MPQ2451DJ-LF-Z directly replace the MPQ2451DT-LF-P in existing designs?

A: Yes. Both parts share identical electrical specifications, functional characteristics, and standard SOT-23-6 package footprints. The substitute is electrically and mechanically compatible for direct replacement.

Q: What is the difference between SOT-23-6 and TSOT-23-6 packages?

A: TSOT-23-6 is a thin variant of the SOT-23-6 package with reduced overall height. Both use the same pin configuration and footprint. Verify PCB assembly clearances if height-sensitive applications are involved.

Q: Why is the MPQ2451DT-LF-P marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life or has been superseded by newer variants. Existing inventory may remain available, but new designs should transition to active alternatives such as the MPQ2451DJ-LF-Z.

Q: Are there any compliance differences between these parts?

A: No. Both parts maintain identical RoHS3 compliance, MSL Level 1 rating, and REACH unaffected status. Regulatory and environmental compliance requirements are equivalent.

Q: What parameters determine substitution eligibility for the MPQ2451DT-LF-P?

A: Substitution is based on matching input/output voltage ranges (3.3V–36V input, 0.8V–32.4V output), output current (600mA), switching frequency (2MHz), package type (SOT-23-6), and compliance certifications (ROHS3, MSL 1). The MPQ2451DJ-LF-Z meets all these criteria.

Q: Is the MPQ2451DJ-LF-Z suitable for new product designs?

A: Yes. The active product status and full compliance certifications make it appropriate for new designs requiring buck regulator functionality in the specified electrical and thermal operating ranges.