TS431BCX

Overview

The TS431BCX 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 features a typical output impedance of 0.2 Ω. The device provides voltage precision options including 2%, 1%, and 0.5%. It is designed for operation with output voltages settable between the internal reference voltage (1.24 V) and 6 V using external resistors. The component includes ESD protection rated at 2 kV via the human body model and 200 V via the machine model.

Feature Summary

• Low-voltage operation capability suitable for regulating 3.3 V switching power supplies
• Wide operating range cathode current from 60 µA to 30 mA
• Typically stable for any capacitive loads
• Integrated ESD protection for robust performance

Applications

• Regulating 3.3 V switching power supplies
• Driving optocouplers in feedback loops
• General-purpose programmable shunt voltage references

Procurement Notes

Verify that the specific suffix BCX corresponds to the required tolerance grade and packaging configuration. Confirm RoHS compliance status and ensure the supplier documentation matches the manufacturer's official specifications for this part number before finalizing procurement orders.

Selection Notes

Select this component when an adjustable shunt reference is required for low-voltage applications below the standard TL431 threshold. It is particularly appropriate for designs needing precise voltage regulation with minimal cathode current consumption. Ensure the application circuit supports the specified output voltage range and load conditions.

Part Context

This component belongs to the TS431 family of low-voltage adjustable shunt voltage references. It serves as a specialized alternative to traditional high-voltage references like the TL431, offering functionality at lower supply voltages. The series is widely used in power management circuits where space and efficiency are critical constraints.

Replacement Considerations

Public confirmed substitute part numbers include TL431KA-TP and TS431BCX variants from other manufacturers. Verify pinout compatibility and electrical parameter equivalence before substitution.