NB669GQ-P

Overview

The NB669GQ-P is a synchronous step-down converter from Monolithic Power Systems, housed in a QFN-16 package. It operates with an input voltage range of 6.5 V to 22 V and delivers up to 6 A output current at a fixed 5 V output. The device integrates an LDO for low-noise applications and supports a switching frequency of 500 kHz. It functions within a temperature range of -40°C to +125°C, featuring a quiescent current of 220 µA and shutdown supply current of 1 µA.

Feature Summary

• Integrates a high-current synchronous buck converter with an embedded low-dropout regulator
• Supports shutdown control for power management optimization
• Designed for surface-mount installation in compact form factors

Applications

• Point-of-load regulation for industrial equipment
• Power distribution systems requiring combined switching and LDO outputs
• Embedded systems with strict thermal operating requirements

Procurement Notes

Verify component authenticity through authorized channels due to limited availability status. Confirm RoHS compliance details via official documentation before integration. Ensure the QFN-16 footprint matches PCB layout specifications. Validate thermal performance under maximum load conditions within the specified operating temperature range.

Selection Notes

Select this component when a single solution provides both high-current switching regulation and a clean LDO output. The 500 kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 6 A current capability against system peak loads to ensure adequate headroom.

Part Context

This part belongs to the NB669 series of power management integrated circuits. It combines traditional DC-DC conversion capabilities with linear regulation features in a single monolithic structure. The design targets applications needing efficient bulk power conversion alongside sensitive analog supply rails.

Replacement Considerations

Consult manufacturer documentation for direct pin-compatible substitutes within the same series. Verify electrical parameters match specific application requirements before substitution.