NB679GD-Z

Overview

The NB679GD-Z is a synchronous step-down DC/DC converter manufactured by Monolithic Power Systems. It operates with an input voltage range of 5.5 V to 26 V and provides a fixed output voltage of 5 V at up to 8 A continuous current. The device integrates a 700 kHz switching frequency and features adaptive constant on-time control for rapid transient response. It includes a built-in 5 V, 100 mA LDO with shutdown capability. Quiescent current is specified at 100 uA. Protection mechanisms include overcurrent, overvoltage, undervoltage lockout, and thermal shutdown.

Feature Summary

• Adaptive constant on-time control architecture enables fast transient response during load changes.
• Integrated low-dropout regulator provides auxiliary power with independent shutdown functionality.
• Comprehensive protection suite ensures reliability against electrical faults and thermal stress.

Applications

• Point-of-load regulation in industrial equipment
• Power distribution systems for embedded computing
• Telecommunications infrastructure power supplies

Procurement Notes

Verify the specific suffix designation when sourcing components to ensure compatibility with required packaging formats. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Cross-reference pin assignments with the latest datasheet revision to prevent layout errors during PCB design implementation.

Selection Notes

Select this component for applications requiring high current density within a compact footprint. The fixed 5 V output simplifies design complexity compared to adjustable variants. Evaluate thermal performance requirements based on the QFN-12 package limitations under maximum load conditions.

Part Context

This part belongs to the NB679 series of power management integrated circuits from Monolithic Power Systems. The series focuses on delivering efficient voltage conversion solutions for space-constrained electronic designs. The GD-Z suffix indicates specific manufacturing and packaging attributes defined by the original equipment manufacturer.

Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify electrical parameter alignment before replacing existing inventory.