Instructions for Using LTC3869IGN-2#PBF

1. Input Voltage (VIN):

   • Ensure the input voltage is within the specified range of 4.5V to 60V.
   • Use appropriate input filtering and decoupling capacitors to stabilize the input voltage.

2. Output Voltage (VOUT):

   • Set the output voltage using external resistors according to the datasheet formula: ( V_ = 0.8 times left(1 + fracright) ).
   • Verify the output voltage with a multimeter to ensure it meets the desired level.

3. Switching Frequency (fSW):

   • Adjust the switching frequency by selecting an appropriate external resistor value for the RT pin.
   • The typical formula for calculating the resistor value is: ( R_T = frac{24.4 times 10^3}{f_} ).

4. Output Current (IOUT):

   • The maximum continuous output current is 20A. Ensure the inductor and other components can handle this current.
   • Use a sense resistor to monitor and limit the output current if necessary.

5. Efficiency (η):

   • The typical efficiency at full load is 95%. Optimize the design by selecting low-resistance components and minimizing parasitic losses.

6. Quiescent Current (IQ):

   • The supply current with no load is typically 60μA. This should be considered when designing low-power applications.

7. Shutdown Current (ISD):

   • The supply current in shutdown mode is typically 1μA. Use the shutdown pin to control the operation of the IC.

8. Operating Temperature (TJ):

   • Ensure the junction temperature remains within the range of -40°C to 125°C. Use proper heat sinking if necessary.

9. Storage Temperature (TS):

   • Store the IC in a temperature range of -65°C to 150°C to avoid damage.

10. Package:

    • The IC is packaged in a 28-lead TSSOP. Follow the recommended PCB layout guidelines to ensure reliable operation.

11. Pin Pitch and Spacing:

    • The pin pitch is 0.65mm, and the pin spacing is 7.00 x 7.00mm. Use a suitable PCB footprint and soldering technique to mount the IC.

For detailed application notes and further information, refer to the official Linear Technology (now part of Analog Devices) datasheet for the LTC3869IGN-2#PBF.