SC432BVSNT1G

Overview

The SC432BVSNT1G is a three-terminal programmable shunt regulator diode from onsemi, part of the NCP432B/SC432B series. It operates as a low temperature coefficient zener with an adjustable output voltage range from the internal 2.5 V reference up to 36 V using two external resistors. The device features a typical initial accuracy of ±0.5% and a full-range temperature coefficient of 50 ppm/°C. It supports a cathode current range of 40 µA to 100 mA with a typical dynamic impedance of 0.22 Ω. Qualified under AEC-Q100 standards for automotive applications, it functions in surface-mount SOT-23-3 packages across an ambient temperature range of -40°C to +125°C.

Feature Summary

• Programmable precision reference utilizing an internal 2.5 V baseline for flexible voltage setting via external resistors
• Automotive-grade qualification ensuring reliability through AEC-Q100 certification and PPAP capability
• Low minimum operating current enabling efficient secondary regulation in switching power supplies
• Temperature compensated operation maintaining stability across the full industrial and automotive temperature range

Applications

• Secondary side voltage regulation in switch-mode power supply adapters
• Precision voltage references for digital voltmeters and instrumentation
• Feedback control circuits driving optocouplers in isolated power converters
• Charger circuitry requiring stable reference thresholds
• Op amp circuitry serving as accurate bias or reference sources

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm that the 'SC' prefix designation aligns with project requirements for unique site and control change protocols mandated by automotive quality standards. Ensure compliance with RoHS directives and check for any specific material composition declarations if restricted substances are a concern for the target application environment.

Selection Notes

Select this component when high precision and automotive reliability are required for shunt regulation tasks. The wide operating current range allows for effective noise filtering and stability management in various load conditions. Consider the low leakage and reference input currents for applications demanding minimal no-load consumption. The SOT-23-3 package offers a compact footprint suitable for space-constrained designs while maintaining robust thermal performance within the specified junction temperature limits.

Part Context

This device belongs to the NCP431/NCP432 family of programmable precision references manufactured by onsemi. The 'SC' prefix specifically denotes parts qualified for automotive and other applications requiring strict site and control change requirements. These devices serve as direct replacements for standard Zener diodes in many analog and power management circuits, offering superior accuracy and temperature stability compared to discrete Zener solutions.

Replacement Considerations

NCP432BVSNT1G