Document named after ISL95813, a part number associated with Intersil multiphase PWM controllers used for CPU core voltage regulation, filed as a 656 KB PDF. The name alone does not show whether it is a datasheet or a related circuit, so open it to confirm. Such references explain pin functions, enable and power-good behaviour, and typical application circuits, which help a technician diagnose a missing CPU core rail on a laptop board. Compare the chip marking on the board with the part number before relying on pinouts.
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 @CLRINDORE. 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.