ZTL431AH6TA

Overview

The ZTL431AH6TA is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It operates within an ambient temperature range of -40°C to +125°C and provides a reference voltage tolerance of 1% at +25°C (A grade). The device supports an adjustable output voltage from the reference level up to 20V, determined by two external divider resistors. It features a typical dynamic output impedance of 0.2Ω and handles sink currents ranging from 1mA to 100mA. The component is housed in a SOT363 surface-mount package.

Feature Summary

• Offers excellent temperature stability across a wide operating range.
• Provides high output current handling capability for shunt regulation.
• Functionally equivalent to TL431/TL432 with specific maximum operation voltage limits.

Applications

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

Procurement Notes

Verify the exact ordering code against the manufacturer's official documentation to ensure correct tolerance grades and packaging specifications. Confirm that the SOT363 package dimensions align with the target PCB layout requirements. Check for any recent product change notices or lifecycle status updates directly from Diodes Incorporated before finalizing procurement plans.

Selection Notes

Select this component when a cost-effective adjustable precision shunt regulator is required for applications needing improved performance over standard zener diodes. Ensure the design accommodates the specified cathode voltage and current limits. Consider the thermal characteristics and stability boundary conditions if capacitive loads are present in the circuit design.

Part Context

This part belongs to the ZTL431/ZTL432 family of adjustable precision shunt regulators. These devices serve as direct replacements for zener diodes in many applications requiring better performance. The ZTL431 variant utilizes a specific pinout configuration distinct from the ZTL432, particularly in SOT23 and SOT23F packages, while maintaining identical electrical specifications.

Replacement Considerations

The datasheet notes functional equivalence to the TL431 and TL432 series, subject to maximum operation voltage differences. Verify pin compatibility and voltage ratings when substituting these components in existing designs.