A good PCB layout for the PMBZ5232B should ensure minimal inductance and resistance in the power lines, and keep the input and output capacitors close to the device. A 4-layer PCB with a solid ground plane and a separate power plane is recommended.
To ensure stability, make sure to follow the recommended component values and PCB layout. Additionally, add a 10nF to 100nF capacitor in parallel with the output capacitor to improve stability. Also, ensure that the input voltage is well-regulated and the output is properly decoupled.
The maximum allowed input voltage ripple for the PMBZ5232B is typically 1% to 2% of the input voltage. Exceeding this limit may affect the device's performance and stability.
While it's possible to use a different inductor value, it's not recommended. The recommended inductor value is chosen to ensure optimal performance and efficiency. Using a different value may affect the device's stability, efficiency, and output voltage regulation.
The output voltage tolerance can be calculated by considering the tolerance of the internal reference voltage, the resistor divider network, and the output voltage feedback loop. A typical output voltage tolerance for the PMBZ5232B is ±2% to ±3%.
