TL431IZ datasheet by STMicroelectronics

TL431IZ Frequently Asked Questions (FAQs)

• What is the recommended operating temperature range for the TL431IZ?
  The recommended operating temperature range for the TL431IZ is -40°C to 125°C.
• How do I ensure stability when using the TL431IZ as a voltage reference?
  To ensure stability, it's recommended to use a bypass capacitor (typically 10nF to 100nF) between the REF and ADJ pins, and to keep the impedance of the output circuit low.
• 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 TL431IZ as a voltage regulator?
  While the TL431IZ can be used as a voltage regulator, it's not recommended as it's primarily designed as a voltage reference. For voltage regulation, consider using a dedicated voltage regulator IC.
• How do I calculate the output voltage of the TL431IZ?
  The output voltage of the TL431IZ 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 in the output divider network.