MPQ8632GL-8-Z Equivalent & Substitute Parts

Part Overview

The MPQ8632GL-8-Z is a buck switching regulator IC manufactured by Monolithic Power Systems Inc., designed for positive adjustable output applications. This device delivers 8A output current with an adjustable voltage range from 0.611V to 13V, operating from a 2.5V to 18V input supply. The part is marked as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent or substitute parts is necessary for ongoing production support, maintenance applications, and legacy system repairs where this topology remains functionally appropriate.

Substiute Parts

MPQ8632GL-8-Z

Monolithic Power Systems Inc.In Stock: 18233MPQ8632GL-8-Z Datasheet

Current PartRFQ

MP8762GLE-P

Monolithic Power Systems Inc.In Stock: 3593MP8762GLE-P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPQ8632GL-8-Z is determined by the following critical parameters:

• Topology & Function: Buck switching regulator with step-down configuration
• Output Characteristics: Positive adjustable output with 0.611V minimum and 13V maximum voltage capability
• Input Voltage Range: Minimum 2.5V to maximum 18V
• Output Current Capability: 8A continuous output
• Switching Frequency: 200kHz to 1MHz operation
• Synchronous Rectification: Integrated synchronous rectifier for efficiency
• Temperature Range: -40°C to 125°C junction temperature
• Compliance: ROHS3 compliant, MSL Level 1

The substitute part MP8762GLE-P maintains functional equivalence in topology, output voltage range, switching frequency, and temperature specifications. Differences in input voltage minimum (4.5V vs. 2.5V), output current (10A vs. 8A), and package format (16-PowerVFQFN vs. 13-VFQFN) must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the MPQ8632GL-8-Z and MP8762GLE-P are ROHS3 compliant with MSL Level 1 ratings, meeting equivalent environmental and regulatory requirements. The MPQ8632GL-8-Z is designated "Not For New Designs," making MP8762GLE-P the preferred choice for new applications requiring equivalent buck regulator functionality.

Selection between these parts depends on application-specific constraints:

• Input Voltage Requirement: If the application requires operation below 4.5V input, the MPQ8632GL-8-Z remains necessary due to its 2.5V minimum input specification.
• Output Current Headroom: The MP8762GLE-P provides 10A output capability versus 8A for the MPQ8632GL-8-Z, offering additional current margin for applications with growing power demands.
• PCB Layout Constraints: The 13-VFQFN package of the MPQ8632GL-8-Z occupies less board area than the 16-PowerVFQFN package of the MP8762GLE-P. Space-constrained designs may require the original part.
• Thermal Considerations: The MP8762GLE-P's higher current rating may provide improved thermal performance in high-current applications due to lower internal dissipation per ampere.

Frequently Asked Questions (FAQ)

Q: Can MP8762GLE-P directly replace MPQ8632GL-8-Z in existing designs?

A: Direct replacement is possible if the application input voltage is 4.5V or higher and PCB layout accommodates the larger 16-PowerVFQFN package. The higher 10A output current of MP8762GLE-P is backward compatible with 8A designs. Pin-to-pin compatibility must be verified against specific board layouts.

Q: What is the significance of the different package sizes?

A: The MPQ8632GL-8-Z uses a 13-pin VFQFN package, while MP8762GLE-P uses a 16-pin PowerVFQFN package. Both maintain the same 3x4mm footprint dimensions, but the 16-pin variant includes additional power pins for improved thermal and current distribution. PCB routing and thermal pad design differ between packages.

Q: Are there input voltage limitations when substituting?

A: Yes. The MP8762GLE-P requires a minimum 4.5V input, compared to 2.5V for the MPQ8632GL-8-Z. Applications operating below 4.5V input cannot use MP8762GLE-P as a substitute.

Q: How do the switching frequency ranges compare?

A: Both parts operate across the identical 200kHz to 1MHz switching frequency range, ensuring equivalent EMI characteristics and external component selection across the substitution.

Q: Are compliance certifications equivalent?

A: Both parts are ROHS3 compliant with MSL Level 1 ratings. Regulatory and environmental compliance requirements are met equally by either part.