NCP431AVSNT1G

Overview

The SC431AVSNT1G is a three-terminal programmable shunt regulator diode from the NCP431 series, manufactured by onsemi. It operates as a low temperature coefficient zener reference, adjustable from Vref to 36 V using two external resistors. The device features an operating current range of 40 µA to 100 mA with a typical dynamic impedance of 0.22 Ω. It has a reference input voltage tolerance of ±1% at 25°C and a typical full-range temperature coefficient of 50 ppm/°C. Qualified under AEC-Q100 standards, it supports an ambient temperature range of -40°C to +125°C in a SOT-23-3 package.

Feature Summary

• Programmable output voltage capability up to 36 V via external resistor divider
• Low minimum operating current enabling extremely low no-load consumption
• Temperature compensated for stable operation across the full rated temperature range
• Automotive qualification (AEC-Q100) with PPAP capability for unique site requirements

Applications

• Voltage adapters
• Switching power supplies
• Precision voltage references
• Battery chargers
• Instrumentation

Procurement Notes

Verify the specific suffix 'VS' confirms the extended industrial temperature range (-40°C to +125°C) and the 'SC' prefix indicates automotive-grade manufacturing controls. Confirm RoHS compliance status through official documentation. Ensure the ordering quantity matches the tape and reel specifications provided by the manufacturer for the SOT-23-3 package configuration.

Selection Notes

Select this component when a precision shunt reference requires operation at high ambient temperatures exceeding standard industrial limits. The low minimum cathode current makes it suitable for secondary regulators in SMPS adapters where minimizing parasitic power consumption is critical. Verify that the required reference accuracy aligns with the ±1% tolerance specification at 25°C.

Part Context

This device belongs to the NCP431/NCP432 family of programmable precision references. The SC prefix denotes parts qualified for automotive applications requiring specific site and control change protocols. These monolithic ICs serve as direct replacements for Zener diodes in digital voltmeters and op-amp circuitry, offering superior stability and lower dynamic impedance compared to discrete solutions.

Replacement Considerations

NCP431AVSNT1G

FAQ

What is the maximum cathode-to-anode voltage rating?

The recommended operating condition specifies a maximum cathode-to-anode voltage of 36 V.

How does the SC prefix affect the part's application scope?

The SC prefix indicates the device is AEC-Q100 qualified and PPAP capable, designed for automotive and other applications requiring unique site and control change requirements.