I want to know how can I add the DC-DC converter on Lt spice.
Maybe this link can help I didn't understand:https://www.slideshare.net/TsuyoshiHorigome/dc-dc-abmsimplified?qid=5ece4c4a-d207-42d2-814a-411258070643&v=&b=&from_search=4 this is a web capture of the link

please I need help today before midnight, I'm only having trouble with adding the converter in Lt spice any other advices no problem, maybe if I can replace the converter with another thing.

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    \$\begingroup\$ A warm welcome to the site. Please note that it's not a free design house or homework-answering service. People will help you take the next step if your question shows you've already done as much as you possibly could - which yours doesn't, I'm afraid. This is a paste of pre-existing material with one line, expecting all the mountains of effort from other people instead of yourself. Please edit your question to show your own work, conclusions and own findings in considerable detail. The better the quality of your question, the better the quality of the answers it will attract. Again, welcome. \$\endgroup\$ – TonyM May 4 at 15:25
  • \$\begingroup\$ Define your voltage tolerance to load regulation, ripple and actual dynamic load. \$\endgroup\$ – Tony Stewart EE75 May 4 at 15:36
  • \$\begingroup\$ General X - Welcome :-) For homework-type questions like this, we need to see your own effort first. Therefore your question is now "on hold". Please click the Edit link below your question, Make it clear exactly where you are stuck. You included screenshots from a website for a whole DC-DC converter model. It isn't clear how you are trying to use that, to model the schematic shown at the top of the page. You would need to add more detail to make your question "on-topic" here, so this may not meet your midnight deadline. However if you add detail, this might be considered for re-opening. \$\endgroup\$ – SamGibson May 4 at 15:41
  • \$\begingroup\$ analog.com/en/design-center/ltpowercad.html \$\endgroup\$ – Tony Stewart EE75 May 4 at 15:43
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    \$\begingroup\$ @SamGibson - Thank you very much it was really helpful from you, I will change the circuit .Thank you again I appreciate it. \$\endgroup\$ – General X May 5 at 15:26