TL432

Overview

The EVVO TL432 is a three-terminal adjustable shunt regulator featuring a highly accurate 1.24V bandgap reference. It provides a wide programmable output voltage range from 1.24V to 18V and supports sink currents from 55μA to 100mA. The device operates within an extended temperature range of -40°C to 125°C, ensuring thermal stability for power supply applications. Available in SOT-23, SOT-23-3, SOT-23-5, SOT-89, and SOP-8 packages, it serves as a precise voltage reference with low output noise.

Feature Summary

• Adjustable voltage and current references
• Voltage monitoring capabilities
• Replacement for Zener diodes
• Comparator with integrated reference

Applications

• Isolated feedback circuits for switching mode power supplies
• Voltage reference requirements in power supply designs
• Voltage monitoring systems
• Comparator applications requiring an integrated reference

Procurement Notes

Verify the specific package suffix (e.g., SC for SOT-23-3, SQ for SOT-89) against the required footprint. Confirm tolerance requirements, as standard versions offer 1% accuracy while 'C' variants provide 0.5%. Ensure the selected component matches the intended operating temperature range and current sinking needs for the target application design.

Selection Notes

Select based on required package type and pinout configuration. Standard TL432 offers 1% VREF tolerance, while TL432C provides 0.5%. Consider thermal resistance values for the chosen package when designing heat dissipation. Verify that the cathode current range meets the minimum regulation requirement of 80µA for stable operation in the specific circuit topology.

Part Context

The TL432 belongs to the family of three-terminal adjustable shunt regulators. These devices utilize a bandgap reference to maintain high accuracy over a wide temperature range. They are commonly used in place of traditional Zener diodes to provide superior stability and programmability in linear and switching power supply architectures.

Replacement Considerations

Compatible alternatives include the TL431 series and other generic adjustable shunt regulators. Verify pin compatibility, particularly for SOT-23 and SOT-23-3 packages where pinouts may vary between manufacturers. Ensure equivalent electrical characteristics such as dynamic impedance and reference voltage tolerance.