ZTL431BQFFTA

Overview

The ZTL431BQFFTA is an automotive-compliant adjustable precision shunt regulator from Diodes Incorporated. It operates within a temperature range of -40°C to +125°C and provides a reference voltage tolerance of 0.5% at +25°C. The device supports an output current capability from 1mA to 100mA, with an adjustable output voltage range spanning from VREF up to 20V. It features a typical dynamic output impedance of 0.2Ω and is housed in a SOT23F package.

Feature Summary

• Qualified to AEC-Q100 Grade 1 standards for high reliability
• Supports PPAP documentation for automotive applications
• Provides excellent temperature stability over the extended commercial range
• Features totally lead-free and fully RoHS compliant construction

Applications

• Opto-Coupler Linearization
• Linear Regulators
• Improved Zener
• Variable Reference

Procurement Notes

Verify that the specific part number matches the required B grade (0.5% tolerance) and FF suffix (SOT23F package). Confirm that the application environment falls within the specified -40°C to +125°C operating ambient temperature range. Ensure that the design accounts for the AEC-Q100 Grade 1 qualification requirements if used in automotive contexts.

Selection Notes

Select this component when an adjustable shunt regulator with tight initial accuracy is required for automotive environments. The B grade offers superior initial tolerance compared to the A grade. Consider the SOT23F package dimensions and pinout configuration, which differs from standard SOT23 variants, to ensure compatibility with the intended PCB layout.

Part Context

This device belongs to the ZTL431AQ, ZTL431BQ, ZTL432AQ, and ZTL432BQ family of three-terminal adjustable shunt regulators. These parts are functionally equivalent to TL431/TL432 devices but feature an increased maximum operation voltage. The ZTL431 series utilizes a standard pinout, while the ZTL432 series employs a different pinout in SOT23 and SOT23F packages.

Replacement Considerations

Functionally equivalent to TL431/TL432 except for maximum operation voltage. Verify pinout compatibility when replacing standard SOT23 versions with the SOT23F variant.

FAQ

What is the difference between the ZTL431 and ZTL432 series?

The ZTL431 and ZTL432 series share identical electrical specifications but utilize different pinouts in the SOT23 and SOT23F packages.

Is the ZTL431BQFFTA suitable for automotive applications?

Yes, it is qualified to AEC-Q100 Grade 1 standards and is classified as Automotive Compliant, supporting PPAP documentation.