TS431ACX

Overview

The TS431ACX is a low-voltage, three-terminal adjustable shunt voltage reference manufactured by Taiwan Semiconductor Corporation. It operates within a cathode current range of 60 μA to 30 mA and supports an output voltage setting between 1.24 V and 6 V using two external resistors. The device features a typical output impedance of 0.2 Ω and maintains stability across various capacitive loads. It includes ESD protection rated at 2 kV for the human body model and 200 V for the machine model, with a temperature coefficient of 100 ppm/°C.

Feature Summary

• Adjustable shunt voltage reference topology enabling precise voltage regulation via external resistors
• Low voltage operation capability suitable for driving optocouplers in switching power supplies
• Wide operating cathode current range supporting diverse load conditions
• Integrated electrostatic discharge protection mechanisms

Applications

• Regulating 3.3 V switching power supplies
• Driving optocouplers in isolated feedback loops
• General purpose voltage reference circuits requiring low voltage operation

Procurement Notes

Verify that the specific part number TS431ACX corresponds to the Taiwan Semiconductor Corporation manufacturing source rather than other vendors such as STMicroelectronics who also produce TS431 variants. Confirm package type and pinout compatibility with the target PCB footprint. Ensure the component meets the required automotive or industrial grade specifications if applicable to the end application environment.

Selection Notes

Select this component when designing circuits that require operation at lower voltages compared to standard TL431 references. It is particularly appropriate for applications needing stable regulation with minimal cathode current consumption. Consider the 1% initial accuracy and temperature coefficient for precision requirements. Evaluate the SOT-23-5 package constraints against available board space and thermal management needs.

Part Context

The TS431 series represents a family of low-voltage programmable shunt references designed to replace traditional higher-voltage counterparts like the TL431. This specific variant from Taiwan Semiconductor offers comparable functionality with optimized performance for modern low-power electronics. It serves as a cost-effective solution for voltage monitoring and regulation tasks in compact electronic systems.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the available documentation. Cross-reference with other TS431 variants from different manufacturers only if electrical parameters and package dimensions are verified to be identical.