DS1822 1-Wire Sensor, Parasitic Power, and Strong Pull-Up Circuit
As shown here, there are two things that can be done.



The Strong Pullup through the Mosfet, should have a appropriately sized Current Limiting Resistor, allowing the tens of milliamps required. If those tens of milliamps are more than your ic's pin can sink, then a secondary in-line resistor (Rt) can be used on the line, for protection.

Best source of information regarding one-wire is of course, Maxim-Dallas's app notes.