ZTL431AE5TA

Overview

The ZTL431AE5TA is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It provides an output voltage range from 2.5V to 20V, set via external resistors. The device features a reference voltage tolerance of 1% at +25°C and operates within an ambient temperature range of -40°C to +125°C. It supports a cathode current range of 1mA to 100mA with a typical dynamic output impedance of 0.2Ω. The component is housed in a surface-mount SOT-25 package.

Feature Summary

• Adjustable output voltage capability between 2.5V and 20V using external divider resistors
• Excellent temperature stability with specified deviation limits over the full operating range
• High sink current handling capability up to 100mA for robust regulation performance
• Totally lead-free construction fully compliant with RoHS standards

Applications

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

Procurement Notes

Verify the specific ordering code ZTL431AE5TA against the manufacturer's official documentation to confirm the active status and packaging details. Ensure compatibility with the required SOT-25 footprint and validate that the 1% initial tolerance meets the design specifications. Confirm compliance with environmental directives such as RoHS and REACH requirements before finalizing procurement.

Selection Notes

Select this component when a cost-effective adjustable shunt regulator is needed to replace standard zener diodes. The 1% tolerance grade (A) suits applications requiring moderate precision. Consider the SOT-25 package dimensions for PCB layout constraints. Verify stability requirements regarding capacitive loads, as adding a capacitor between anode and cathode may be necessary for reliable operation under specific conditions.

Part Context

This part belongs to the ZTL431/ZTL432 family of adjustable precision shunt regulators. These devices are functionally equivalent to TL431/TL432 types but feature distinct maximum operation voltages. The family offers various grades and packages, including SOT23, SOT23F, SOT363, and SOT25, providing flexibility for different power management and reference voltage applications.

Replacement Considerations

Functionally equivalent parts include the TL431 series, though maximum voltage ratings differ. For direct pin-compatible alternatives within the same family, consider other ZTL431 variants in different packages or tolerances, such as ZTL431BE5TA for 0.5% accuracy.