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Review my 12v to 5v buck convertor IC and circuit

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MrOmnos:
Hi all, I am designing a Esp32 I2C board for interfacing i2C sensors and led matrix displays. I want my board to work with 5-12v power supplies or battery. Hence, I need a buck converter on board. I am thinking of getting few pcbs made from a fab house. But I don't have any experience with designing switching regulators. I do not want my boards to go to waste so It would be really nice if you guys could take a look at my circuit to see if I need to add or remove anything. I looked at many ICs fixed and adjustable. I liked fixed ics because they seem to use few passive components. So I went with AP1509 fixed 5v version. I drew the circuit from the datasheet.

Also I am thinking that it would be better if I could use 5v supply as well when in need. The ap1509 datasheet says Vin from 4.5 to 40v does that mean if I give 5v instead of 12v to vin the vout will still be 5v?
Or would it be better to have the 5v input to be directly on the input side of AMS1117-3.3? If i put 5v input on the  input side of AMS1117-3.3 what protections do I need to have for the AP1509? Hope to learn something from this. Thankyou !!

ocset:
https://www.diodes.com/assets/Datasheets/AP1509.pdf

...if you want 5v out of ap1509, you have to put at least 7v in....datasheet says

aiq25:
How much current are you looking to get out of the 5V buck?

fourtytwo42:
You don't seem to have spent much time reviewing your schematics, why hasn't the 3V3 regulator got a ground connection ?

MrOmnos:
About 1.5 to 2A maximum but most of the times it will run at less than 1 Amps.

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