NCS37021MNTWG

Overview

The NCS37021MNTWG is a specialized power management integrated circuit designed for Ground Fault Circuit Interrupter (GFCI) applications. It functions as a UL943 compliant signal processor featuring self-test capabilities. The device integrates a flexible power supply, including a 12 V shunt regulator and a low-dropout regulator. It operates within an input voltage range of 4 V to 12 V and draws an operating supply current of 10 mA. The component is housed in a 16-QFN (3x3 mm) package with exposed pad and supports surface mount installation.

Feature Summary

• Integrates UL943 compliant signal processing for ground fault detection
• Includes built-in self-test functionality for safety verification
• Features integrated flexible power supply with 12 V shunt regulation

Applications

• Ground Fault Circuit Interrupter systems
• Self-test GFCI signal processing
• UL943 compliant protection circuits

Procurement Notes

Verify the specific suffix MNTWG against the manufacturer datasheet to confirm package type and tape-and-reel specifications. Confirm that the 4 V to 12 V input range aligns with the target system design. Ensure compliance with UL943 standards is required for the intended application. Check current availability status as distribution may vary by region.

Selection Notes

Select this component when designing GFCI devices requiring integrated signal processing and power regulation. The 16-QFN package suits compact surface-mount designs. Verify that the 10 mA supply current fits the system power budget. Ensure the 4 V to 12 V input range matches the available supply rails. Confirm thermal performance requirements for the QFN-16 enclosure.

Part Context

This part belongs to onsemi's specialized PMIC portfolio focused on safety-critical applications. It replaces discrete solutions by combining signal processing and power management in a single chip. The NCS37021 series targets the residential and commercial GFCI market, offering a compact alternative to multi-component architectures while maintaining regulatory compliance.

Replacement Considerations

Check for direct pin-compatible substitutes within the NCS37021 family. Verify if older revisions or different suffixes offer identical electrical characteristics. Consult the manufacturer for end-of-life notifications or recommended new parts if discontinuation is indicated.