AS431IBRTR-G1

Overview

The AS431IBRTR-G1 is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It features a programmable output voltage range from the internal reference of 2.5V up to 36V. The device offers an initial voltage tolerance of 1% at +25°C and operates within a temperature range of -40°C to +125°C. It utilizes a SOT-89 surface-mount package and supports cathode currents from 50µA to 100mA.

Feature Summary

• Provides precise, programmable output voltage regulation using external resistors
• Features low minimum cathode current requirements for efficient operation
• Ensures high stability under capacitive load conditions
• Delivers low temperature deviation for consistent thermal performance

Applications

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

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status and check for specific manufacturing lot codes if required. Ensure storage conditions meet humidity sensitivity level requirements to prevent damage prior to assembly.

Selection Notes

Select this component when a low-cost, adjustable shunt regulator with 1% accuracy is needed. Verify that the SOT-89 package fits the board layout constraints. Consider the AP431S as the recommended alternative for new designs due to updated product recommendations.

Part Context

This part belongs to the AS431I series of low cathode current adjustable precision shunt regulators. It serves as a direct replacement for Zener diodes in various power management applications. The series is designed to provide stable reference voltages across wide operating ranges.

Replacement Considerations

Diodes Incorporated recommends using the AP431S instead of the AS431I for new designs. The AP431S shares similar electrical characteristics but represents the updated product line recommendation.