Instructions for BD9244AFV

1. Input Capacitor (CIN):

   • Use a ceramic capacitor with a minimum capacitance of 10 μF.
   • Place the capacitor as close as possible to the input pins to minimize noise.

2. Output Capacitor (COUT):

   • Use a ceramic or tantalum capacitor with a minimum capacitance of 10 μF.
   • For better stability, use a capacitor with an ESR (Equivalent Series Resistance) between 0.1 Ω and 10 Ω.

3. Feedback Resistor Network:

   • The output voltage is set by the ratio of two resistors (R1 and R2) connected to the FB pin.
   • Use the formula ( V_ = V_ times left(1 + fracright) ), where ( V_ ) is typically 0.8V.

4. Inductor Selection:

   • Choose an inductor with a saturation current higher than the maximum output current.
   • The inductance value should be between 4.7 μH and 10 μH for optimal performance.

5. Thermal Management:

   • Ensure adequate heat dissipation by using a heatsink or PCB copper area.
   • The device can operate up to 160°C, but it is recommended to keep the junction temperature below 125°C for reliable operation.

6. PCB Layout:

   • Keep the traces from the input capacitor to the IC as short as possible.
   • Use wide traces for power paths to reduce resistance and inductance.
   • Ground planes should be used to improve thermal performance and reduce noise.

7. Protection Circuits:

   • The device includes built-in overcurrent, overvoltage, and thermal protection.
   • No additional external components are required for these protections.

8. Start-up Time:

   • The start-up time is typically less than 1 ms under normal conditions.
   • Ensure that the input voltage rises slowly to avoid inrush currents.

9. Shutdown Function:

   • The device can be shut down by pulling the EN pin low.
   • The shutdown current is typically less than 1 μA.

10. Stability:

    • The device is stable with a wide range of output capacitors.
    • For critical applications, consult the datasheet for specific stability guidelines.