A good PCB layout for the MB351 involves keeping the input and output traces short and separate, using a solid ground plane, and placing decoupling capacitors close to the device. A 4-layer PCB with a dedicated 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 between the VIN and GND pins to filter out high-frequency noise. A soft-start circuit can also help prevent oscillation during power-up.
Although the datasheet specifies a maximum input voltage of 18V, it's recommended to limit the input voltage to 15V to ensure reliable operation and prevent damage to the device.
The MB351 is rated for operation up to 125°C, but its performance may degrade at high temperatures. Ensure proper thermal management, such as using a heat sink or reducing the ambient temperature, to maintain reliable operation.
The output voltage of the MB351 can be calculated using the formula: VOUT = (VIN x R2) / (R1 + R2), where R1 and R2 are the feedback resistors. However, this calculation assumes an ideal scenario, and actual output voltage may vary depending on the specific application and component tolerances.
