PDF of 1.47 MB named slus702a, which follows Texas Instruments literature numbering, where SLUS documents usually cover power management parts and the trailing letter marks revision A. The specific chip is not stated in the name, so open the first page to see which controller it describes. Datasheets like this provide pinouts, typical application circuits and feedback resistor formulas, useful when checking a PWM controller or charger on a laptop board for correct voltages and shorts.
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 @one5technology. 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.