TL431AS-13

Overview

The TL431AS-13 is an adjustable precision shunt voltage reference manufactured by Diodes Incorporated. It operates within a cathode current range up to 100 mA and supports output voltages from 2.495 V to 36 V. The device features a maximum input voltage of 40 V and maintains an initial accuracy of 1%. Designed for surface mount applications, it utilizes a 3-pin SOT-23 package with tape and reel packaging. The component functions reliably across an extended temperature range spanning from -40 °C to 125 °C.

Feature Summary

• Provides programmable output voltage via external resistor divider network
• Features low dynamic output impedance for stable regulation
• Ensures guaranteed temperature stability over the operating range

Applications

• Precision power supply regulation circuits
• Portable equipment voltage references
• Battery-powered system monitoring

Procurement Notes

Verify the specific suffix 'AS' against the manufacturer's official datasheet to confirm the exact tolerance grade and temperature rating. Ensure the ordering code matches the required SOT-23 tape and reel configuration. Cross-reference the RoHS compliance status with the latest environmental declaration documents provided by Diodes Incorporated prior to procurement.

Selection Notes

Select this component when a compact surface-mount solution is required for adjustable shunt regulation. The SOT-23 package suits space-constrained designs. Verify that the application voltage does not exceed the 40 V maximum input limit. Confirm that the load current requirements remain within the 100 mA operational boundary for optimal performance.

Part Context

This part belongs to the TL431 family of three-terminal adjustable shunt regulators. These devices serve as cost-effective alternatives to Zener diodes in feedback loops. The series is widely utilized in switching power supplies and linear regulator circuits where precise voltage referencing is critical for system stability and accuracy.

Replacement Considerations

Compatible substitutes include the AP431FBF-13 and AS431HMANTR-G1. Verify pinout compatibility and electrical specifications before substitution.