MPQ2128DG-LF-Z Equivalent & Substitute Parts

Part Overview

The MPQ2128DG-LF-Z is a buck switching regulator IC from Monolithic Power Systems Inc., designed for positive adjustable output applications. This component functions as a step-down converter with a 1A output capacity and operates across an input voltage range of 2.5V to 6V. The device is classified as not for new designs, indicating its legacy status in the product portfolio. Identifying equivalent and substitute parts is necessary for applications requiring continued supply, design flexibility, or inventory optimization while maintaining electrical and mechanical compatibility.

Substiute Parts

MPQ2128DG-LF-Z

Monolithic Power Systems Inc.In Stock: 2773MPQ2128DG-LF-Z Datasheet

Current PartRFQ

MP2128DG-LF-Z

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MPQ2128DG-LF-Z is determined by strict alignment of the following critical parameters:

• Input voltage range: 2.5V to 6V
• Output voltage range: 0.6V to 6V (adjustable)
• Output current capacity: 1A
• Switching frequency: 2.8MHz
• Synchronous rectifier topology: Yes
• Package type: 8-TFDFN Exposed Pad (8-QFN 2x2)
• Surface mount configuration
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

The substitute part MP2128DG-LF-Z meets all electrical and mechanical parameters specified for the main part. Both components share identical functional specifications, topology, and packaging requirements, establishing direct substitutability based on provided technical data.

Parameter Comparison

Engineering Selection Recommendations

The MP2128DG-LF-Z is the manufacturer-recommended substitute for the MPQ2128DG-LF-Z. Both parts maintain identical electrical specifications, package configuration, and compliance certifications. The primary distinction is product status: the MPQ2128DG-LF-Z is designated as not for new designs, while the MP2128DG-LF-Z carries active product status. For applications requiring continued component supply or new design implementations, the MP2128DG-LF-Z is the appropriate selection. Both parts satisfy ROHS3 compliance and REACH unaffected requirements, ensuring regulatory compatibility across industrial and commercial applications.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts share identical electrical specifications, including input voltage range (2.5V–6V), output voltage range (0.6V–6V), output current (1A), switching frequency (2.8MHz), and package configuration (8-TFDFN Exposed Pad). No circuit modifications are required for direct substitution.

Q: What is the significance of the product status difference?

A: The MPQ2128DG-LF-Z is marked as not for new designs, indicating it is in legacy status. The MP2128DG-LF-Z maintains active product status, ensuring continued manufacturer support, availability, and compliance updates. For new applications, MP2128DG-LF-Z is the recommended choice.

Q: Are the operating temperature ranges identical?

A: The MPQ2128DG-LF-Z operates from –40°C to 125°C (TJ), while the MP2128DG-LF-Z operates from –40°C to 85°C (TA). Applications requiring operation above 85°C ambient temperature should retain the MPQ2128DG-LF-Z. For standard industrial applications within 85°C ambient limits, both parts are functionally equivalent.

Q: Do both parts use the same package footprint?

A: Yes. Both components use the 8-TFDFN Exposed Pad package (8-QFN 2x2) with surface mount configuration. PCB layouts and footprints are directly compatible without modification.

Q: Are there any compliance or certification differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical MSL ratings (1 – Unlimited). Regulatory and environmental compliance requirements are satisfied by either part.