NCP3066MNTXG

Overview

The NCP3066MNTXG is a monolithic switching regulator designed for high-brightness LED applications, manufactured by onsemi. It operates as a buck, boost, or inverting constant current source with an integrated 1.5 A Darlington switch. The device supports a wide input voltage range from 3 V to 40 V and features a low feedback voltage of 235 mV for precise current regulation. It offers adjustable switching frequencies up to 250 kHz and includes analog and PWM dimming capabilities via the ON/OFF pin. Packaged in an 8-DFN (4x4) surface-mount format, it provides thermal shutdown and cycle-by-cycle current limiting.

Feature Summary

• Integrates a 1.5 A Darlington power switch for direct LED driving without external pass transistors.
• Supports configurable Buck, Boost, and Inverting topologies using minimal external components.
• Enables precise LED current regulation through a low 235 mV internal feedback reference voltage.
• Provides flexible brightness control via analog and digital PWM dimming functions accessible through the ON/OFF pin.

Applications

• High-brightness LED lighting systems
• Automotive exterior and interior illumination
• Portable battery-powered LED drivers
• General solid-state lighting modules

Procurement Notes

Verify component authenticity through authorized distribution channels to ensure compliance with RoHS standards and lead-free specifications. Confirm package integrity for the 8-DFN form factor prior to assembly. Review the latest Product Change Notification for any manufacturing site or material updates. Validate that the specific revision matches design requirements for thermal and electrical performance.

Selection Notes

Select this component when designing circuits requiring a single-chip solution for high-current LED strings. The wide 3 V to 40 V input range accommodates various unregulated power sources. Ensure the application benefits from the simplified design process due to the absence of required loop compensation. Consider the 250 kHz maximum frequency for optimizing inductor size while maintaining efficiency.

Part Context

This part belongs to the NCP3066 series of switching regulators specialized for LED driver applications. It complements other onsemi PMIC solutions by offering a dedicated constant current topology. The series distinguishes itself through integrated protection features and flexible configuration options suitable for diverse lighting environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs if considering alternative models from the same family or different manufacturers.