Instructions for Use

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 4.5V to 40V.
   • Use appropriate input capacitors to filter out noise and provide stable input.

2. Output Voltage (VOUT):

   • The output voltage is fixed at 5.0V. No external resistors are required for voltage setting.

3. Output Current (IOUT):

   • The device can deliver up to 3A of continuous output current.
   • Use adequate heat sinking if operating near the maximum current to maintain thermal stability.

4. Efficiency:

   • The typical efficiency is 88% when VIN = 12V and VOUT = 5V.
   • Efficiency may vary with different input and output conditions.

5. Switching Frequency (fSW):

   • The switching frequency is fixed at 260kHz.
   • This helps in minimizing the size of external components like inductors and capacitors.

6. Quiescent Current (IQ):

   • The quiescent current is typically 2.7mA under no load conditions.
   • This low quiescent current helps in reducing power consumption.

7. Shutdown Current (ISD):

   • When the shutdown pin (SHDN) is pulled low, the device enters a low-power mode with a typical shutdown current of 35μA.
   • Use this feature to conserve power when the device is not in use.

8. Thermal Shutdown (TSD):

   • The device will automatically shut down if the junction temperature exceeds 160°C to prevent damage.
   • Ensure proper heat dissipation to avoid thermal shutdown.

9. Operating Junction Temperature (TJ):

   • The operating junction temperature range is from -40°C to 125°C.
   • Ensure the device operates within this temperature range to avoid reliability issues.

10. PCB Layout:

    • Use a good PCB layout practice to minimize parasitic inductances and ensure stable operation.
    • Place the input and output capacitors as close as possible to the device to reduce noise and improve transient response.

11. Inductor Selection:

    • Choose an inductor with low DC resistance (DCR) to minimize power loss.
    • The inductor value should be selected based on the desired ripple current and output current.

12. Capacitor Selection:

    • Use high-quality ceramic capacitors for both input and output to ensure stable operation.
    • The input capacitor should have a low ESR to filter out high-frequency noise.

By following these guidelines, you can ensure optimal performance and reliability of the LM2673S-5.0/NOPB in your application.