TL431ACDT datasheet by STMicroelectronics

TL431ACDT Frequently Asked Questions (FAQs)

• What is the recommended operating temperature range for the TL431ACDT?
  The recommended operating temperature range for the TL431ACDT is -40°C to 125°C.
• How do I ensure stability when using the TL431ACDT as a voltage reference?
  To ensure stability, it's recommended to decouple the TL431ACDT with a 10nF to 100nF capacitor between the REF and ADJ pins, and to use a low-ESR capacitor (e.g., ceramic or film capacitor) for the output capacitor.
• What is the maximum allowed voltage on the REF pin?
  The maximum allowed voltage on the REF pin is 36V, but it's recommended to keep it below 30V to ensure reliable operation.
• Can I use the TL431ACDT as a voltage regulator?
  While the TL431ACDT can be used as a voltage regulator, it's not recommended due to its limited current capability (up to 15mA). Instead, consider using a dedicated voltage regulator IC.
• How do I calculate the output voltage of the TL431ACDT?
  The output voltage of the TL431ACDT can be calculated using the formula: Vout = Vref x (1 + R1/R2), where Vref is the internal reference voltage (2.5V), and R1 and R2 are the resistors connected between the ADJ and REF pins.