TL432ATA

Overview

The HTC TL432ATA is a three-terminal programmable precision shunt regulator featuring a 1.24V bandgap reference with 1% tolerance. It operates within a cathode voltage range of VREF to 18V and supports a sink current capability from 0.1mA to 100mA. The device exhibits an equivalent full-range temperature coefficient of 50ppm/°C, ensuring thermal stability across the -40°C to 125°C operating range. Packaged in TO-92 (Tape, Bent), it provides low output noise and dynamic impedance typical of 0.2Ω.

Feature Summary

• Provides a highly accurate 1.24V bandgap reference voltage with guaranteed 1% tolerance.
• Features temperature compensation for stable operation over the full rated operating temperature range.
• Offers wide sink current capability ranging from 0.1mA to 100mA.

Applications

• Shunt Regulator
• Voltage Monitoring
• Current Source and Sink Circuits
• Low Output Voltage (3.0V to 3.3V) Switching Power Supply Error Amplifier

Procurement Notes

Verify the specific ordering suffix 'TA' corresponds to the TO-92 Tape & Ammo Pack configuration as defined in the manufacturer's ordering information table. Confirm that the 1% tolerance variant matches the required circuit accuracy specifications. Ensure the procurement documentation references the May 2023 R2.0.1 datasheet revision for accurate electrical characteristic validation.

Selection Notes

Select this component when a low-cost solution with high performance is required for isolated feed circuits or precision references. The TO-92 package is suitable for applications where through-hole mounting is preferred. Consider the 18V maximum cathode voltage limit and the 100mA sink current capability when designing the feedback network and load conditions.

Part Context

The TL432 series consists of three-terminal adjustable shunt regulators designed for general-purpose voltage reference applications. Manufactured by HTC (TAEJIN Techno), this family includes variants in TO-92, SOT-23-3L, and SOT-89-3L packages. The TL432ATA specifically utilizes the TO-92 form factor, providing a robust option for industrial and commercial temperature ranges compared to smaller surface-mount alternatives.

Replacement Considerations

Compatible substitutes include other TL432 series devices from different manufacturers such as Texas Instruments or STMicroelectronics, provided they support the same 1.24V reference voltage and TO-92 pinout compatibility. Verify that alternative parts meet the 1% tolerance requirement and the 18V cathode voltage rating.