NB670AGQ-Z

Overview

The NB670AGQ-Z is a Monolithic Power Systems integrated synchronous step-down converter and linear regulator. It features a 5 V to 22 V input range, delivering up to 6 A on the primary buck output and 100 mA on the secondary LDO output. The device operates at a fixed 500 kHz switching frequency with an adjustable buck output voltage ranging from 0.604 V to 5.5 V. Packaged in a 16-pin QFN (3x3 mm) for surface mount applications, it supports a junction temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-current synchronous buck converter with an auxiliary low-dropout linear regulator in a single package
• Utilizes Constant On-Time control architecture for fast transient response and simplified external component selection
• Includes comprehensive protection mechanisms such as overcurrent protection, thermal shutdown, and undervoltage lockout

Applications

• Point-of-load regulation for industrial equipment and IoT gateways
• Power distribution networks in automotive infotainment and telematics systems
• Voltage regulation for baseband processors and memory modules in embedded computing platforms

Procurement Notes

Verify the specific suffix against official manufacturer documentation to confirm pin compatibility and electrical characteristics. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer, as availability may vary by region and production cycle.

Selection Notes

Select this component when a dual-output solution is required within a compact footprint. Ensure the application demands both a high-current adjustable rail and a fixed auxiliary voltage. Verify that the 500 kHz switching frequency aligns with electromagnetic interference constraints and inductor size requirements.

Part Context

This part belongs to the NB670 series of power management ICs designed for space-constrained applications. It combines DC-DC conversion with linear regulation to reduce bill-of-materials count. The QFN-16 package facilitates efficient thermal dissipation while maintaining a small board area profile suitable for dense PCB layouts.

FAQ

What is the maximum current capability of the integrated LDO?

The integrated LDO provides a maximum output current of 100 mA.

Does the NB670AGQ-Z support adjustable output voltage?

Yes, the primary buck converter output voltage is adjustable from 0.604 V to 5.5 V using external resistors.