TL432CTA

Overview

The HTC TL432CTA is a low-voltage adjustable precision shunt regulator manufactured by TAEJIN Techno (HTC). It features a guaranteed reference voltage of 1.24V, distinguishing it from standard 2.5V counterparts. The device operates with a sink current capability ranging from 80µA to 100mA and exhibits a typical output impedance of 0.2Ω. Designed for surface-mount applications, it utilizes the SOT-23 package configuration. This component provides stable voltage regulation suitable for low-voltage power supply architectures requiring precise reference levels.

Feature Summary

• Low voltage reference architecture centered on a 1.24V nominal baseline
• Wide dynamic sink current range supporting microampere to milliampere loads
• Low dynamic output impedance ensuring stable regulation under varying load conditions
• Compact surface-mount packaging optimized for space-constrained circuit designs

Applications

• Low-voltage linear regulators
• Precision battery charger circuits
• Portable instrumentation references
• Computer peripheral power management

Procurement Notes

Verify the specific suffix 'CTA' against the official HTC datasheet to confirm temperature grade and tape-and-reel specifications. Ensure the 1.24V reference characteristic aligns with system requirements, as this differs from the industry-standard 2.5V TL431/TL432 variants. Confirm package integrity and authenticity through authorized distribution channels.

Selection Notes

Select the TL432CTA when a sub-2.5V reference is required for low-voltage biasing or feedback networks. Its 1.24V reference allows for different resistor divider ratios compared to standard shunt regulators. Evaluate the 80µA minimum cathode current requirement to ensure stability in light-load scenarios within the target application circuit.

Part Context

This component belongs to the HTC TL432 family of adjustable shunt regulators. While sharing functional similarities with the widely used TL431 series, the TL432 variant specifically targets low-voltage applications with its 1.24V reference point. It serves as a specialized alternative for designs where standard 2.5V references are unsuitable for the desired output voltage scaling.

Replacement Considerations

Direct pin-compatible replacements include other manufacturers' TL432 variants with 1.24V references, such as those from IK Semicon or Unisonic Technologies. Verify that substitute parts maintain the same 1.24V reference tolerance and SOT-23 pinout compatibility before integration.