MPQ2128DG-LF-P Equivalent & Substitute Parts

Part Overview

The MPQ2128DG-LF-P is a buck switching regulator IC from Monolithic Power Systems Inc., designed for step-down voltage conversion with positive adjustable output. This component delivers 1A output current with an input voltage range of 2.5V to 6V and adjustable output from 0.6V to 6V. The device operates at a switching frequency of 2.8MHz and includes a synchronous rectifier for improved efficiency.

The MPQ2128DG-LF-P carries a "Not For New Designs" product status, indicating it has been superseded. Identifying equivalent substitute parts is essential for ongoing production support, maintenance applications, and design continuity where this component is already deployed.

Substiute Parts

MPQ2128DG-LF-P

Monolithic Power Systems Inc.In Stock: 840MPQ2128DG-LF-P Datasheet

Current PartRFQ

MP2128DG-LF-Z

Monolithic Power SystemsIn Stock: 2543MP2128DG-LF-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The MP2128DG-LF-Z qualifies as a direct substitute for the MPQ2128DG-LF-P based on the following critical parameters:

Electrical Compatibility:

• Identical input voltage range: 2.5V to 6V
• Identical output voltage range: 0.6V to 6V
• Identical output current rating: 1A
• Identical switching frequency: 2.8MHz
• Identical synchronous rectifier implementation
• Identical topology: Buck step-down regulator
• Identical output configuration: Positive adjustable

Mechanical & Package Compatibility:

• Identical package type: 8-TFDFN Exposed Pad
• Identical supplier device package: 8-QFN (2x2)
• Identical mounting type: Surface Mount

Compliance & Certification:

• Identical RoHS status: ROHS3 Compliant
• Identical moisture sensitivity level: 1 (Unlimited)
• Identical REACH status: REACH Unaffected

The primary distinction is product status: the MPQ2128DG-LF-P is marked "Not For New Designs," while the MP2128DG-LF-Z is "Active," making it the recommended ongoing source for this functional specification.

Parameter Comparison

Engineering Selection Recommendations

The MP2128DG-LF-Z is the direct substitute for the MPQ2128DG-LF-P. Both parts share identical electrical specifications, package geometry, and compliance certifications. The substitution is valid for all applications where the MPQ2128DG-LF-P was originally specified.

The MP2128DG-LF-Z carries "Active" product status, ensuring ongoing availability and manufacturer support. This part is suitable for new production builds, replacement stock, and field service applications. The MPQ2128DG-LF-P, marked "Not For New Designs," should be transitioned to the MP2128DG-LF-Z for continuity of supply and long-term design support.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the MP2128DG-LF-Z directly replace the MPQ2128DG-LF-P in existing designs?

A: Yes. The MP2128DG-LF-Z is electrically and mechanically identical to the MPQ2128DG-LF-P. Input voltage range, output voltage range, output current, switching frequency, and package type are all equivalent. No circuit modifications are required.

Q: What is the difference between the MPQ2128DG-LF-P and MP2128DG-LF-Z?

A: The primary difference is product lifecycle status. The MPQ2128DG-LF-P is marked "Not For New Designs," indicating it has been superseded. The MP2128DG-LF-Z is the active equivalent with identical specifications and is the recommended source for ongoing production and new applications.

Q: Are the packages identical?

A: Yes. Both parts use the 8-TFDFN Exposed Pad package (8-QFN 2x2). PCB footprints, land patterns, and mounting procedures are identical.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the MPQ2128DG-LF-P and MP2128DG-LF-Z are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the operating temperature range difference?

A: The MPQ2128DG-LF-P specifies -40°C to 125°C (junction temperature). The MP2128DG-LF-Z specifies -40°C to 85°C (ambient temperature). For applications operating within -40°C to 85°C ambient conditions, both parts are suitable.