MPQ4481GU-FD-AEC1-P

Overview

The MPQ4481GU-FD-AEC1-P is a Monolithic Power Systems automotive-grade synchronous buck converter. It operates with an input voltage range of 6 V to 36 V and delivers up to 3 A output current. The device features programmable switching frequencies from 235 kHz to 2.2 MHz and fixed output voltages including 5.1 V, 5.17 V, and 5.3 V. Packaged in a 26-QFN (5x5 mm) footprint, it supports junction temperatures from -40°C to +125°C and holds AEC-Q100 qualification.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for harsh environment operation
• Integrated synchronous rectification topology for high efficiency and compact design
• Programmable switching frequency allows optimization for external component size and performance
• Wide input voltage range accommodates various automotive power bus architectures

Applications

• Automotive infotainment system power distribution
• Telematics control unit voltage regulation
• ADAS sensor module power supply conditioning
• Body control module DC-DC conversion

Procurement Notes

Verify the specific suffix designation carefully during procurement. Datasheet records indicate that the MPQ4481GU-AEC1-P variant is marked as Not Recommended for New Designs (NRND), with MPQ4228GRE-AEC1-Z suggested as the replacement. Ensure the FD suffix aligns with current manufacturing availability and does not conflict with obsolete status indicators found in distributor listings.

Selection Notes

Select this component when designing for automotive applications requiring a 3A buck converter with flexible frequency options. The 26-QFN package suits space-constrained PCB layouts. Confirm that the required output voltage matches the available fixed options or verify if external feedback networks are supported for other voltages. Ensure thermal management meets the 125°C junction temperature requirement.

Part Context

This part belongs to the MPQ4481 series of step-down converters from Monolithic Power Systems. It is designed specifically for automotive electronics, offering robust performance under varying load and temperature conditions. The series integrates protection features typical of modern PMICs, targeting reliable operation in vehicle electrical systems.

Replacement Considerations

Official documentation identifies MPQ4228GRE-AEC1-Z as the recommended replacement for new designs due to the NRND status of related variants.