Why does my switching regulator circuit deliver 4.4V instead of 1.2V?

[soFPG]

Hello,

it seems like I am not even capable of building a correct switching regulator circuit. My idea was that this circuit should produce 1.2V from 5V input (see attachment).

However, what I am getting is 4.4V.

Any idea why this could be (datasheet of JW5033S: https://datasheet.lcsc.com/szlcsc/1906281506_JoulWatt-Tech-JW5033S_C324577.pdf )?

[AndyC_772]

What are the pin numbers, and which package are you using? The two options are different.

[soFPG]

Ye, you have the finger right on the spot.

My footprint is wrong 

[Monkeh]

Quick fix: Put the chip on upside down.

[soFPG]

I don't think this will do it. I switched BST and FB

[Monkeh]

Ah, well, if you didn't flat out use the wrong pinout in its entirety, no, that won't work.

[AndyC_772]

Ye, you have the finger right on the spot.

My footprint is wrong 

Pro tip: Always include pin numbers on every schematic symbol, unless it's just for a 2 pin passive.

Also, not that it applies in this particular case, but always make every pin on a device visible, especially any exposed pads on QFN and similar packages.