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looking for a DC-DC Boost/Buck converter chip solution



hi ti:

I am looking for a DC-DC Boost/Buck converter chip solution and would appreciate your recommendation on a suitable model.

The specific operating conditions are: the input voltage ranges from 14V to 21V, requiring a stable output of 18V at 8A. Additionally,

I require the chip to have low heat generation during operation, minimal external components, and easy to design with.

Please recommend a suitable model based on these requirements. Thank you very much.