The recommended operating temperature range for TL431AFDT is -40°C to 125°C. However, it's essential to note that the device's performance may vary outside the typical operating temperature range of 0°C to 70°C.
To ensure stable operation, it's crucial to follow proper PCB layout guidelines, decouple the device with a 10nF to 100nF capacitor, and provide a stable reference voltage. Additionally, ensure that the device is operated within its recommended operating conditions and that the output current is within the specified limits.
While TL431AFDT can be used as a voltage regulator, it's not its primary function. The device is designed as a precision programmable shunt regulator, and its output voltage is not intended to be used as a regulated voltage source. If you need a voltage regulator, consider using a dedicated voltage regulator IC.
The output voltage of TL431AFDT can be calculated using the formula: Vout = Vref x (1 + R1/R2), where Vref is the internal reference voltage (2.495V), R1 is the resistance between the cathode and the reference pin, and R2 is the resistance between the reference pin and the anode.
The maximum output current of TL431AFDT is 100mA. However, it's essential to ensure that the device is operated within its recommended operating conditions and that the output current is within the specified limits to prevent overheating and ensure reliable operation.
TL431AFDT datasheet
by NXP Semiconductors
