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Hi Harsh,
If you're looking to stay in the same family where the footprint would be the same, you can use TPS54320 (3A) however it's a bit below your need.
On the other hand, we have buck converters with 4A with same Current Mode mechanism which include converter: TPS62914 or it's module: TPSM82914. At 5A max we have LM2641 also with Current Mode. Lastly, if you are looking for a newer device, we have TPS543620 (6A) which incorporates Advanced Current Mode.
Regards,
Eileen