MP28490DN-LF Equivalent & Substitute Parts

Part Overview

The MP28490DN-LF is an active 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 single adjustable output, delivering up to 5A of output current. The device operates across an input voltage range of 4.5V to 30V and supports output voltage adjustment from 0.8V to 15V. With an 8-SOIC surface mount package and integrated synchronous rectification, the MP28490DN-LF serves applications requiring compact, efficient power conversion. Substitute parts are identified to address specific application requirements such as enhanced thermal performance, different package constraints, or alternative electrical specifications.

Substiute Parts

MP28490DN-LF

Monolithic Power Systems Inc.In Stock: 773MP28490DN-LF Datasheet

Current PartRFQ

MP8765GQ-P

Monolithic Power Systems Inc.In Stock: 2125MP8765GQ-P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP28490DN-LF is determined by compatibility across the following critical parameters:

• Topology & Function: Both main and substitute parts must operate as buck (step-down) switching regulators with positive adjustable output configuration
• Output Capability: Substitute parts must support the required output voltage range and current delivery for the target application
• Input Voltage Range: The substitute must accept the system input voltage without exceeding its maximum input specification
• Synchronous Rectification: Presence of integrated synchronous rectifier in both parts ensures comparable efficiency characteristics
• Thermal & Environmental: Operating temperature range and compliance certifications must meet or exceed application requirements
• Package & Mounting: Surface mount compatibility is maintained; package form factor may differ based on application constraints

The MP8765GQ-P qualifies as a substitute based on these criteria, with adjustments required for specific application parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the MP28490DN-LF and MP8765GQ-P are active products from Monolithic Power Systems Inc. with ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications.

The MP28490DN-LF is suitable for applications requiring:

• Extended input voltage range up to 30V
• Higher maximum output voltage up to 15V
• Compact 8-SOIC package footprint
• Standard thermal operating range to 85°C

The MP8765GQ-P is suitable for applications requiring:

• Higher output current capability (6A vs 5A)
• Extended operating temperature range to 125°C
• Lower moisture sensitivity (MSL 1 vs 2A)
• Higher switching frequency (500kHz vs 420kHz)

Selection between these parts depends on specific application constraints regarding input voltage ceiling, output voltage requirements, thermal environment, and package space availability.

Frequently Asked Questions (FAQ)

Q: Can the MP8765GQ-P replace the MP28490DN-LF in all applications?

A: No. The MP8765GQ-P has a lower maximum input voltage (22V vs 30V) and lower maximum output voltage (5.5V vs 15V). Substitution is valid only when the application input voltage does not exceed 22V and the required output voltage does not exceed 5.5V.

Q: What are the package differences between these parts?

A: The MP28490DN-LF uses an 8-SOIC (0.154", 3.90mm Width) package with exposed pad. The MP8765GQ-P uses a 16-PowerVFQFN (3x3) package. These are physically different form factors requiring different PCB layouts and footprints.

Q: How do the switching frequencies differ?

A: The MP28490DN-LF operates at 420kHz, while the MP8765GQ-P operates at 500kHz. The higher frequency in the MP8765GQ-P may result in smaller external component sizes but may also increase switching losses in certain applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the MP28490DN-LF and MP8765GQ-P are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory standards.

Q: What is the significance of the MSL rating difference?

A: The MP28490DN-LF has MSL 2A (4 weeks), while the MP8765GQ-P has MSL 1 (unlimited). MSL 1 indicates lower moisture sensitivity and longer shelf life without baking, which may reduce handling and storage requirements for the substitute part.

Q: Can the MP8765GQ-P handle higher output current?

A: Yes. The MP8765GQ-P is rated for 6A output current compared to 5A for the MP28490DN-LF. This provides additional current headroom in applications where the main part is operating near its current limit.