Datasheet in PDF form, 895 KB, for the ISL88731C, an Intersil SMBus-controlled battery charger IC widely used on notebook motherboards. A technician consults it to identify pin functions, the gate drive and current-sense connections, and the conditions the embedded controller must meet over SMBus before charging begins. It is handy when diagnosing no-charge or no-power faults on the charger stage. Check the top marking on the chip on your board against this part number, and use the reference schematic in the document for comparison.
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.