JAJSJZ1B August 2022 – February 2024 TPS543B22
PRODUCTION DATA
The output voltage is set with a resistor divider created by RFBT and RFBB from the output node to the FB pin. Use 1% tolerance or better resistors. For this example design, 4.99 kΩ was selected for RFBB. Using Equation 28, RFBT is calculated as 4.99 kΩ. This is a standard 1% resistor.
If the PCB layout does not use the recommended AGND to PGND connection in Section 7.4.1, noise on the feedback pin can degrade the output voltage regulation at maximum load. Using a smaller RFBB of 1.00 kΩ minimizes the impact of this noise.