FAN251040MNTXG

Overview

The FAN251040MNTXG is a synchronous buck regulator from onsemi, designed for high-current applications. It delivers an output current of 40 A with an adjustable output voltage range from 600 mV to 18 V. The device operates with an input voltage between 4.5 V and 20 V. Key electrical parameters include a quiescent current of 3.6 mA and a programmable switching frequency from 200 kHz to 2.2 MHz. It features a WQFN-34 package and supports operation temperatures from -40°C to +125°C.

Feature Summary

• Integrated PMBus interface for digital control and monitoring
• Synchronous buck topology for high efficiency
• Adjustable switching frequency for optimization

Applications

• Server and storage systems
• Telecommunications infrastructure
• Industrial equipment power distribution

Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and thermal characteristics. Ensure compatibility with PMBus controllers in the target design. Check RoHS compliance status via manufacturer documentation before integration.

Selection Notes

Select this component when a 40 A synchronous buck solution with digital control is required. Compare against the FAN251030 for lower current needs or FAN251015 for even lower loads. Verify that the 20 V maximum input voltage meets system requirements.

Part Context

This part belongs to the FAN2510 series of synchronous buck regulators. It shares architectural similarities with the FAN251030 but offers higher current capability. The series is designed for point-of-load applications requiring precise regulation and digital management.

Replacement Considerations

The FAN251030MNTXG is a documented substitute within the same family, offering similar functionality at 35 A. Verify if the reduced current rating suits the application load profile.