A compact 203 KB PDF datasheet for the NCP6131, an ON Semiconductor multiphase voltage regulator controller found in the CPU core power stage of many laptops. Only the part number is given in the name, so the exact document revision is unknown. It lists pin functions, enable and power-good behaviour, VID interface and reference schematics. A technician compares the measured voltages on the controller against these tables to find out why the core rail fails to start, and checks the marking on the chip against the part number first.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @ic_mosfet_pdf_datasheets. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.