Instructions for Using the LT1368CN8

1. Power Supply:

   • Ensure the supply voltage (Vcc) is within the range of 4.5V to 20V.
   • Connect the input capacitor (Cin) close to the Vcc pin to minimize noise and ensure stable operation.

2. Output Voltage Setting:

   • The output voltage (Vout) can be adjusted using external resistors R1 and R2 connected to the feedback (FB) pin.
   • Use the formula: ( V_ = 1.23 times left(1 + fracright) ).

3. Quiescent Current:

   • The quiescent current (IQ) is typically 1.5mA. This value should be considered when designing the power budget.

4. Shutdown Function:

   • To shut down the device, pull the shutdown (SHDN) pin low. The shutdown current (ISD) is typically 1.0μA.
   • To enable the device, pull the SHDN pin high (Vcc or higher).

5. Load Regulation:

   • The device can provide up to 150mA of continuous load current (Iout).
   • Ensure the load does not exceed this limit to avoid overheating and potential damage.

6. Switching Frequency:

   • The typical switching frequency (fsw) is 1.0MHz. This can be adjusted by changing the external components if needed.

7. Efficiency:

   • The efficiency (η) is typically 80% at full load. Optimize the design to achieve the best efficiency.

8. Dropout Voltage:

   • The dropout voltage (Vdo) is typically 1.2V at full load. Ensure the input voltage is always at least 1.2V higher than the desired output voltage.

9. Thermal Considerations:

   • The operating temperature (Toper) range is from -40°C to 125°C.
   • The storage temperature (Tstg) range is from -65°C to 150°C.
   • Use appropriate heat sinking if the device will operate in high-temperature environments.

10. PCB Layout:

    • Place the input and output capacitors as close as possible to the respective pins to reduce parasitic inductance and improve stability.
    • Ensure proper grounding and decoupling to minimize noise and interference.

11. Capacitor Selection:

    • Choose input and output capacitors with low ESR (Equivalent Series Resistance) to improve performance and stability.
    • Typical values for Cin and Cout are 10μF and 100μF, respectively, but these can vary based on specific application requirements.

By following these guidelines, you can ensure optimal performance and reliability of the LT1368CN8 in your design.