NCP5388MNR2G

Overview

The NCP5388MNR2G is a surface-mount voltage regulator controller designed for Intel Pentium IV processors. It supports VR10 and VR11 standards with four output channels in a 40-QFN package. The device operates within an ambient temperature range of 0°C to 70°C or 85°C, depending on the specific variant configuration. It accepts input voltages between 4.5V and 5.5V and provides regulated outputs from 0.375V to 1.6V. This component integrates soft-start capabilities and PWM control for efficient power management.

Feature Summary

• Supports 2/3/4 phase buck controller configurations for processor voltage regulation
• Compatible with Intel VR10 and VR11 architecture standards
• Integrates soft-start functionality to manage inrush current during startup

Applications

• Intel Pentium IV processor voltage regulation
• VR10 compliant motherboard power designs
• VR11 compliant CPU power delivery systems

Procurement Notes

Verify the exact operating temperature grade (0°C to 70°C vs 0°C to 85°C) as specifications may vary by manufacturing lot or regional variant. Confirm RoHS compliance status and check for active production status, as this part number has been subject to End-of-Life notifications in previous years. Ensure the 40-QFN footprint matches your PCB layout requirements before ordering.

Selection Notes

Select this component when designing for legacy Intel Pentium IV platforms requiring VR10 or VR11 compliance. It is suitable for applications needing multi-phase buck control with integrated soft-start. Consider thermal performance limits if operating near the upper temperature boundary. Verify that the 4.5V to 5.5V input range aligns with your system's main rail voltage availability.

Part Context

This part belongs to onsemi's specialized PMIC portfolio targeting high-performance computing. It serves as a dedicated controller rather than a complete switching regulator, requiring external MOSFETs. The NCP5388 series is distinct from general-purpose regulators, focusing specifically on CPU core voltage tracking and stability for older generation processors.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Check for newer revisions within the NCP538x family or consult manufacturer obsolescence notices for direct replacements.