TL431AIDT

Product Overview

The TL431AIDT from STMicroelectronics is a shunt voltage reference IC with an adjustable output. The device provides a minimum fixed reference voltage of 2.495 V and supports a maximum output voltage of 36 V, with an output current capability of 100 mA. Its ±1% tolerance and cathode current of 700 µA define its basic regulation characteristics. The part uses a surface-mount 8-SOIC package and is specified for operation over a temperature range of -40°C to 105°C (TA).

Key Features

• Shunt voltage reference topology with adjustable output configuration.
• Minimum fixed output voltage of 2.495 V and maximum output voltage of 36 V.
• Output current rating of 100 mA with ±1% tolerance.
• Cathode current specification of 700 µA.
• Surface-mount 8-SOIC package with 3.90 mm width.
• Operating temperature range from -40°C to 105°C (TA).

Applications

• Reference voltage node in general power supply regulation circuits.
• Adjustable reference input for analog measurement and calibration modules.
• Set-point reference in control boards and instrumentation systems.
• Reference point in equipment power distribution designs.

Design & Procurement Notes

Design considerations should account for the 8-SOIC surface-mount footprint and the -40°C to 105°C (TA) operating range when placing the part on a board. The adjustable output and 2.495 V minimum fixed voltage require external reference setting and bias arrangements to achieve the desired output within the 36 V maximum limit. The 100 mA output current and 700 µA cathode current should be checked against the intended load and regulation network. The ±1% tolerance should be considered when establishing circuit tolerance budgets.