TL431ACZ-AP datasheet by STMicroelectronics

TL431ACZ-AP Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for the TL431ACZ-AP?
  The TL431ACZ-AP can operate from -40°C to 125°C, making it suitable for a wide range of applications.
• How do I ensure stability when using the TL431ACZ-AP as a voltage reference?
  To ensure stability, it's essential to decouple the TL431ACZ-AP 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 capacitor) for the output capacitor.
• What is the recommended layout and PCB design considerations for the TL431ACZ-AP?
  To minimize noise and ensure proper operation, it's recommended to keep the TL431ACZ-AP away from high-current paths, use a solid ground plane, and keep the input and output capacitors close to the device. Additionally, use a low-impedance path for the output capacitor and avoid routing high-frequency signals near the TL431ACZ-AP.
• Can I use the TL431ACZ-AP as a voltage regulator?
  While the TL431ACZ-AP is primarily a voltage reference, it can be used as a simple voltage regulator in some applications. However, it's essential to note that it's not designed for high-current applications and may not provide the same level of regulation as a dedicated voltage regulator IC.
• How do I calculate the output voltage of the TL431ACZ-AP?
  The output voltage of the TL431ACZ-AP can be calculated using the formula: Vout = Vref * (1 + R1/R2), where Vref is the internal reference voltage (approximately 2.5V), and R1 and R2 are the resistors connected between the REF, ADJ, and output pins.