ZTL431ACSTZ

Overview

The ZTL431ACSTZ is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It provides excellent temperature stability and an output current handling capability up to 100mA. The output voltage is programmable between 2.5V and 20V using two external divider resistors. This device serves as a high-performance replacement for standard zener diodes in applications requiring improved regulation. It features a reference voltage tolerance of 1% at +25°C and operates within an ambient temperature range of -40°C to +125°C.

Feature Summary

• Offers excellent temperature stability with a reference voltage tolerance of 1% at +25°C
• Provides sink current capability ranging from 1mA to 100mA
• Features totally lead-free construction that is fully RoHS compliant
• Functions as a direct replacement for zener diodes with superior performance

Applications

• Opto-coupler linearization
• Linear regulators
• Variable reference circuits
• Improved zener applications

Procurement Notes

Verify the specific package type and suffix against official datasheets, as ordering codes vary significantly by pinout configuration and tolerance grade. Confirm availability status directly with the manufacturer or authorized distributors, as component lifecycle stages change frequently. Ensure compliance requirements match project specifications regarding halogen and antimony-free definitions.

Selection Notes

Select this component when precise voltage referencing is required over a wide temperature range. Choose based on the necessary initial tolerance grade and the specific package footprint constraints of the PCB layout. Consider the maximum cathode voltage rating and thermal dissipation characteristics relative to the expected operating conditions and load capacitance requirements.

Part Context

This part belongs to the ZTL431/ZTL432 family of adjustable shunt regulators produced by Diodes Incorporated. These devices are functionally equivalent to industry-standard TL431/TL432 regulators, differing primarily in maximum operation voltage limits. The family includes various grades and packages to accommodate different design needs while maintaining consistent core electrical performance.

Replacement Considerations

Functionally equivalent to the TL431 and TL432 series, though maximum operation voltages may differ. Verify pinout compatibility if substituting across different package types within the same family, such as SOT23 versus SOT23F variants.