TL431CDT

Product Overview

The TL431CDT from STMicroelectronics is a surface-mount shunt voltage reference intended for adjustable reference voltage functions in power management designs. Its specified output range extends from 2.495 V to 36 V, and it provides a 100 mA output current rating with a 1 mA cathode current specification. The device has a ±2.21% tolerance and is rated for operation from 0°C to 70°C (TA). It is supplied in an 8-SOIC (0.154", 3.90 mm Width) package for surface-mount assembly.

Key Features

• Shunt voltage reference with adjustable output
• Specified output range from 2.495 V to 36 V
• 100 mA output current rating
• 1 mA cathode current specification
• ±2.21% tolerance
• Operating temperature range of 0°C to 70°C (TA)
• Surface-mount 8-SOIC (0.154", 3.90 mm Width) package

Applications

• Adjustable reference node in DC power supply feedback circuits
• Setpoint voltage generation for analog measurement and sensor conditioning
• Shunt reference in battery-powered electronics requiring a defined voltage point

Design & Procurement Notes

For layout, the 8-SOIC package and surface-mount mounting type require standard SMT assembly. The 0°C to 70°C (TA) operating range should be considered when placing the device near heat sources or in enclosures. Circuit design should account for the 2.495 V to 36 V adjustable output range, 100 mA output current rating, and 1 mA cathode current specification. The ±2.21% tolerance can be used when establishing reference voltage margins in power supply feedback or measurement circuits. When selecting this part, verify that the system's ambient temperature, reference current, and output voltage requirements align with these specifications.