TS431IZ

Overview

The TS431IZ is a low-voltage, three-terminal adjustable shunt voltage reference manufactured by STMicroelectronics. It operates within a cathode current range of 60 μA to 30 mA and provides an adjustable output voltage between 1.24 V and 6 V using two external resistors. The device features an initial accuracy of 2% and a temperature coefficient of 100 ppm/°C. It supports a maximum series reference input voltage of 10 V and functions reliably across a temperature range from -40°C to +125°C. Packaged in TO-92-3 for through-hole mounting, it offers low output impedance and stability with capacitive loads.

Feature Summary

• Adjustable output voltage settable between 1.24 V and 6 V via external resistors
• Wide operating cathode current range supporting low-power applications
• Low output impedance ensuring stable performance under varying load conditions
• Robust ESD protection against human body and machine model discharges

Applications

• Regulating 3.3 V switching power supplies when driving optocouplers
• Precision voltage references in low-voltage electronic circuits
• Battery-powered devices requiring stable reference voltages

Procurement Notes

Verify the specific suffix 'IZ' corresponds to the TO-92-3 through-hole package and 2% accuracy variant. Confirm RoHS compliance status and REACH SVHC declarations directly with the manufacturer or authorized distributors prior to procurement. Ensure the ordering quantity aligns with factory packaging requirements if applicable.

Selection Notes

Select this component for designs requiring a low-cost, adjustable shunt reference with a wide operating temperature range. It is suitable for replacing TL431 equivalents where lower minimum cathode current operation is beneficial. Consider the TO-92-3 package constraints for PCB layout and thermal management in high-temperature environments up to 125°C.

Part Context

The TS431 belongs to STMicroelectronics' family of adjustable shunt voltage references, designed as a low-voltage alternative to standard industry references. It shares functional similarities with the TL431 but offers optimized performance at lower voltages and currents. This series is widely used in power supply feedback loops and general-purpose voltage regulation tasks.

Replacement Considerations

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