The SUU3V212V2 is a . It works fine for powering a single 3W LED or a 3.3V fan from a 12V rail. However, it is not reliable for sensitive microcontrollers (use an LDO or genuine LM2596 instead).
If you are developing or documenting this driver, it follows a standard lifecycle: suu3v212v2 driver
Could you provide the name of your computer model or the "Hardware ID" from Device Manager? This will allow me to find the exact download link for you. The SUU3V212V2 is a