TL431IDT

Product Overview

The TL431IDT from STMicroelectronics is a shunt voltage reference integrated circuit with an adjustable output. It provides a 2.495 V minimum/fixed output voltage and a 36 V maximum output voltage, with an output current of 100 mA and a cathode current of 1 mA. The device uses an 8-SOIC surface-mount package and is specified for operation from -40°C to 105°C ambient. This part is intended for circuit designs that require a surface-mount reference element with a ±2.21% tolerance.

Key Features

• Shunt voltage reference topology with adjustable output.
• Output voltage from 2.495 V minimum/fixed to 36 V maximum.
• Output current of 100 mA and cathode current of 1 mA.
• Tolerance of ±2.21%.
• Operating temperature range of -40°C to 105°C (TA).
• Surface-mount 8-SOIC package, 0.154" (3.90mm) width.

Applications

• Reference generation for analog measurement and data acquisition circuits.
• Feedback and regulation support in power supply circuits.
• Bias reference use in instrumentation and control circuitry.

Design & Procurement Notes

For board-level selection of the TL431IDT, consider the shunt topology, adjustable output, 2.495 V minimum/fixed output, 36 V maximum output, 100 mA output current, and 1 mA cathode current when calculating biasing and regulation margins. The ±2.21% tolerance should be included in the system error budget. The -40°C to 105°C (TA) range and 8-SOIC surface-mount package should be evaluated against the PCB layout, thermal environment, and assembly process. Use the exact STMicroelectronics part number to maintain package and electrical characteristic consistency.