TS431ILT

Overview

The TS431ILT is a low-voltage, three-terminal adjustable shunt voltage reference IC from STMicroelectronics. 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 an initial accuracy of 1% and a temperature coefficient of 100 ppm/°C. It is housed in a surface-mount SOT-23-5 package and is qualified under the AEC-Q100 standard for automotive applications.

Feature Summary

• Adjustable shunt voltage reference with wide operating cathode current range
• Automotive grade qualification compliant with AEC-Q100 standards
• Low output impedance typically stable for capacitive loads

Applications

• Regulating 3.3 V switching power supplies
• Driving optocouplers in feedback loops
• Precision voltage reference circuits in automotive electronics

Procurement Notes

Verify that the specific suffix 'I' denotes the automotive-grade variant and 'LT' indicates the SOT-23-5 tape and reel packaging configuration. Confirm that the component meets the required AEC-Q100 reliability standards for your target application environment before finalizing procurement orders.

Selection Notes

Select this component when a low-voltage operation down to 1.24 V is required compared to standard TL431 references. It is suitable for designs needing high precision (1%) and automotive certification. Ensure the design accommodates the SOT-23-5 footprint and the specified thermal operating range.

Part Context

This part belongs to the TS431 family of adjustable shunt voltage references. It serves as a low-voltage alternative to traditional TL431 devices, offering improved performance at lower voltages and currents while maintaining compatibility with common feedback control architectures used in power conversion systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.