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.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, 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.