TL431IZT datasheet by STMicroelectronics

TL431IZT Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for the TL431IZT?
  The TL431IZT can operate from -40°C to 150°C, making it suitable for a wide range of applications.
• How do I ensure stability when using the TL431IZT as a voltage reference?
  To ensure stability, it's essential to decouple the TL431IZT with a capacitor (typically 10nF to 100nF) between the REF and ADJ pins, and to use a low-ESR capacitor (e.g., ceramic or film) for the output capacitor.
• What is the recommended layout and PCB design considerations for the TL431IZT?
  To minimize noise and ensure proper operation, keep the TL431IZT away from high-current paths and noisy signals. Use a ground plane, and keep the input and output capacitors close to the device. Avoid using long traces and vias, and use a low-impedance path for the output.
• How do I calculate the output voltage of the TL431IZT?
  The output voltage (Vout) of the TL431IZT 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 voltage divider network.
• What is the typical current consumption of the TL431IZT?
  The typical current consumption of the TL431IZT is around 2.5mA, but this can vary depending on the output voltage and load conditions.