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Supercapacitor Based Backup Power Supply

Supercapacitor Based Backup Power Supply

In this application, two series of supercapacitors are charged to 5V during normal operation to provide the needed backup energy in case the primary power fails. As long as the primary power is present, the LTC3536 remains in Burst Mode operation with very low quiescent current, minimizing drain on the backup storage capacitor. The MODE pin is used to change from Burst Mode to PWM mode operation when primary power is interrupted.




LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

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