NCP81241MNTXG

Overview

The NCP81241MNTXG is a single-phase synchronous buck controller designed for computer applications. It operates within an input voltage range of 4.75 V to 5.25 V and supports output voltages from 0 V to 2.3 V. The device utilizes hysteretic control mode and features a switching frequency of 250 kHz. Packaged in a QFN-20 format, it is rated for industrial temperature operation with a minimum working temperature of -40°C and a maximum of 125°C.

Feature Summary

• Hysteretic control architecture for rapid transient response
• Integrated synchronous buck topology
• Designed specifically for computer application power rails

Applications

• Computer motherboard voltage regulation modules
• CPU core power supply circuits
• Single-phase step-down power conversion systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer datasheet to confirm package type and tape-and-reel specifications. Confirm that the component meets the required industrial temperature range and RoHS compliance standards for your target assembly process. Cross-reference the active status with official onsemi channels to ensure availability and current revision levels before finalizing procurement plans.

Selection Notes

Select this controller when a single-phase hysteretic solution is required for low-voltage, high-current computer loads. Ensure the design accommodates the fixed 250 kHz switching frequency and the specified 4.75 V to 5.25 V input window. Verify that the QFN-20 thermal pad requirements align with the PCB layout capabilities for adequate heat dissipation at the intended load conditions.

Part Context

This component belongs to the NCP812xx series of power management integrated circuits from onsemi. It is part of a family of controllers tailored for multi-phase and single-phase voltage regulation in computing environments. The series typically includes variants supporting different phase counts and control modes to address various processor power delivery requirements.

Replacement Considerations

Consult the official onsemi cross-reference documentation for verified alternative part numbers. Do not assume functional compatibility with other single-phase controllers without validating pinout, control loop characteristics, and electrical specifications against the original design requirements.