MP28490DN-LF-Z Equivalent & Substitute Parts

Part Overview

The MP28490DN-LF-Z is a buck switching regulator IC from Monolithic Power Systems Inc., designed for positive adjustable step-down voltage regulation with a 5A output capacity. This component operates across a 4.5V to 30V input range and delivers adjustable output from 0.8V to 15V, making it suitable for diverse power management applications requiring flexible voltage conversion.

The MP28490DN-LF-Z carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's product roadmap. This status necessitates identifying functionally equivalent alternatives for ongoing production requirements, maintenance applications, and new design considerations where similar performance characteristics are required.

Substiute Parts

MP28490DN-LF-Z

Monolithic Power Systems Inc.In Stock: 4145MP28490DN-LF-Z Datasheet

Current PartRFQ

MP8765GQ-Z

Monolithic Power Systems Inc.In Stock: 34653MP8765GQ-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP28490DN-LF-Z is evaluated based on the following critical parameters that define functional equivalence:

Topology & Function: Both the main part and substitute must operate as buck (step-down) switching regulators with positive adjustable output configuration and single output.

Electrical Performance: Input voltage range, output voltage range, output current capacity, and switching frequency determine whether a substitute can fulfill the same power conversion role.

Synchronous Rectification: The presence of integrated synchronous rectification in both parts ensures comparable efficiency characteristics.

Compliance & Certifications: RoHS3 compliance and REACH status must be maintained to satisfy regulatory requirements.

Packaging & Thermal Characteristics: While package form factors may differ, surface mount technology and operating temperature ranges must support the intended application environment.

The MP8765GQ-Z qualifies as a manufacturer-recommended substitute based on these criteria, despite differences in package type and certain electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The MP8765GQ-Z is designated as the manufacturer-recommended substitute for the MP28490DN-LF-Z. This recommendation is supported by the following factors:

Product Status Alignment: The MP8765GQ-Z carries an "Active" product status, ensuring ongoing manufacturer support, availability, and compliance updates. This directly addresses the obsolescence concern associated with the MP28490DN-LF-Z's "Not For New Designs" classification.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and hazardous substance regulations.

Improved Thermal Performance: The MP8765GQ-Z operates across a wider temperature range (-40°C to 125°C junction temperature) compared to the MP28490DN-LF-Z (-40°C to 85°C ambient temperature), providing enhanced thermal margin for demanding applications.

Enhanced Moisture Handling: The MP8765GQ-Z features MSL 1 (Unlimited) rating versus MSL 2A (4 Weeks) for the original part, reducing moisture sensitivity concerns during storage and handling.

Output Current Capability: The MP8765GQ-Z delivers 6A output current, exceeding the 5A specification of the MP28490DN-LF-Z, providing additional design margin.

Design Considerations: The MP8765GQ-Z operates within a reduced input voltage range (5V to 22V versus 4.5V to 30V) and output voltage range (0.604V to 5.5V versus 0.8V to 15V). Applications requiring the full input or output voltage range of the original part require evaluation against the substitute's specifications. The package transition from 8-SOIC to 16-PowerVFQFN necessitates PCB layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the MP8765GQ-Z directly replace the MP28490DN-LF-Z without circuit modifications?

A: Functional substitution is possible for applications operating within the MP8765GQ-Z's electrical specifications. The reduced input voltage range (5V minimum versus 4.5V) and output voltage range (0.604V to 5.5V versus 0.8V to 15V) must be verified against your application requirements. The package change from 8-SOIC to 16-PowerVFQFN requires PCB redesign.

Q: What are the key electrical differences between these parts?

A: The MP8765GQ-Z provides higher output current (6A versus 5A), higher switching frequency (500kHz versus 420kHz), and a lower minimum output voltage (0.604V versus 0.8V). The input voltage range is narrower (5V to 22V versus 4.5V to 30V), and the maximum output voltage is lower (5.5V versus 15V). These differences must be evaluated against specific application requirements.

Q: Why is the package different between the main part and substitute?

A: The MP8765GQ-Z uses a 16-PowerVFQFN package, which provides improved thermal performance and integration density compared to the 8-SOIC package of the MP28490DN-LF-Z. This package change reflects modern manufacturing practices and enhanced thermal management capabilities.

Q: Are there any compliance or certification differences?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. The MP8765GQ-Z features improved moisture sensitivity rating (MSL 1 Unlimited versus MSL 2A 4 Weeks), reducing handling and storage constraints.

Q: What should I verify before implementing the MP8765GQ-Z as a substitute?

A: Verify that your application's input voltage range falls within 5V to 22V and output voltage requirements fall within 0.604V to 5.5V. Confirm that the 16-PowerVFQFN package footprint can be accommodated in your PCB layout. Evaluate the higher switching frequency (500kHz) for potential EMI implications. Validate thermal performance with the improved operating temperature range.

Q: Is the MP8765GQ-Z suitable for new designs?

A: Yes. The MP8765GQ-Z carries an "Active" product status and is recommended for new designs, providing long-term availability and manufacturer support advantages over the "Not For New Designs" MP28490DN-LF-Z.