LTC4002 Li-Ion Battery Charger... How do I connect the Comp pin?
The 100&micro;A current source on the COMP pin is internal to the part -- see the block diagram on page 9 of the datasheet.  This means that the soft-start time is controlled by the value of the capacitor in the RC network connected to the pin -- there's no need to inject an external current into COMP for such a basic function.