AN431BN-ATRE1

Overview

The AN431BN-ATRE1 is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It provides a programmable output voltage ranging from 2.5V to 36V with an initial accuracy of ±1.0%. The device operates within a cathode current range of 1mA to 100mA and features a typical temperature coefficient of 20PPM/°C. It is housed in a surface-mount SOT-23 package and supports an operating ambient temperature range from -40°C to +125°C.

Feature Summary

• Offers sharp turn-on characteristics and low dynamic output impedance for stable regulation.
• Provides high stability under capacitive load conditions across the full operating range.
• Features guaranteed thermal stability with low temperature deviation over the entire temperature range.

Applications

• Charger circuits
• Voltage adapters
• Switching power supplies
• Graphic cards
• Precision voltage references

Procurement Notes

Verify that the component matches the specific 1.0% tolerance designation (AN431B) rather than the 0.5% variant. Confirm the SOT-23-3 package type and tape-and-reel packaging format. Ensure compliance with RoHS and lead-free requirements as specified in the ordering information section of the datasheet.

Selection Notes

Select this component when a precise, adjustable shunt reference is required with a maximum cathode voltage of 36V. The 1.0% tolerance makes it suitable for general-purpose applications where tighter precision is not critical. Consider the low dynamic output resistance and wide operating temperature range for robust performance in varying environmental conditions.

Part Context

This part belongs to the AN431 series of adjustable precision shunt regulators from Diodes Incorporated. The series serves as a direct replacement for Zener diodes in various electronic designs. The 'A' suffix indicates a 40V maximum rating, while the 'B' suffix denotes a 20V maximum rating; however, the datasheet specifies a 36V operational limit for the series.

Replacement Considerations

Compatible substitutes include the AZ431AN-ATRE1 and AN431AN-ATRE1. Verify that alternative parts match the required 1.0% tolerance and SOT-23-3 package dimensions before implementation.

FAQ

What is the minimum cathode current required for regulation?

The minimum cathode current for regulation is typically 1.0 mA.

Is the AN431BN-ATRE1 suitable for use with large capacitive loads?

Yes, the device offers high stability under capacitive load conditions.