Hi I'm wondering if there's any SMD IC chip to stabilize a 12v input to a stabilized output? I need something like that to regulate power on PCB. Thank you.
The device you want is called a "voltage regulator" - there are a great many voltage regulator integrated circuits commercially available.
To choose a suitable regulator, you will need to know the desired input voltage range, output voltage, desired output current, and desired package.
You can search for appropriate parts at such places as Digikey and Mouser, and other electronic distributors.