The recommended operating temperature range for the TL431BQDBVTE4 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 stability, it's crucial to follow proper PCB layout practices, such as keeping the input and output capacitors close to the device, using a low-ESR capacitor for the output, and minimizing the length of the feedback loop. Additionally, the datasheet recommends a minimum output capacitor value of 10nF.
The maximum allowed voltage on the REF pin is 2.5V. Exceeding this voltage may damage the device or affect its performance. It's essential to ensure that the voltage on the REF pin is within the recommended range of 1.24V to 2.5V.
While the TL431BQDBVTE4 is primarily a voltage reference, it can be used as a voltage regulator in certain applications. However, it's essential to note that the device is not designed to handle high currents, and its output impedance is relatively high. Therefore, it's recommended to use the TL431BQDBVTE4 as a voltage reference and pair it with an external amplifier or pass transistor for voltage regulation.
The output voltage of the TL431BQDBVTE4 is determined by the voltage on the REF pin and the ratio of the resistors in the feedback network. The output voltage can be calculated using the formula: Vout = Vref * (1 + R1/R2), where Vref is the voltage on the REF pin, and R1 and R2 are the resistors in the feedback network.
TL431BQDBVTE4 datasheet
by Texas Instruments
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