Instructions for Use:

1. Input Voltage:

   • Ensure the input voltage is within the specified range of 2.7V to 5.5V.
   • Use appropriate input capacitors to stabilize the input voltage.

2. Output Voltage Setting:

   • The output voltage can be adjusted using external resistors. Refer to the datasheet for specific resistor values.

3. Inductor Selection:

   • Choose an inductor that matches the switching frequency and output current requirements. A typical inductor value is 1.0μH for this device.

4. Output Capacitor:

   • Use low ESR ceramic capacitors for the output to ensure stability and minimize ripple. A recommended value is 10μF.

5. PCB Layout:

   • Place the input and output capacitors as close as possible to the device to minimize parasitic inductance.
   • Use wide and short traces for power and ground connections to reduce resistance and inductance.

6. Thermal Management:

   • Ensure adequate heat dissipation by providing a thermal pad or heatsink if operating at high currents or in high ambient temperatures.

7. Protection:

   • The device includes overcurrent, short-circuit, and thermal shutdown protection. However, it is recommended to design the system with additional protective measures as needed.

8. Enable Pin:

   • The enable pin can be used to control the on/off state of the converter. Connect to VCC to enable and to GND to disable.

9. Shutdown Mode:

   • To enter shutdown mode, pull the enable pin low. The quiescent current will drop to 0.5μA in this mode.

10. Stability:

    • Ensure the loop compensation network is properly designed to maintain stability over the entire operating range. Refer to the datasheet for compensation component values.

For detailed application notes and further information, refer to the PS21964-4S datasheet provided by the manufacturer.