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LM5175: LTSpice simulation issue with LM5175

Part Number: LM5175

Dear Team,

This is regarding the LTSpice simulation query about the converter operation using LM5175IC. I have recieved the simulation model from TI team and using in the LTSpice simulation. But unfortunately the converter output is not observed as per the requirement. For the designed buck boost circuit where my input is 8 to 18v and output is 15v, the converter always shows input equal to output.

Herewith I have attached the LTSpice simulation circuit

Kindly help to solve the issue.

Thanking You in advance.

Kureti