Referring to Figure 44, the SD pin is connected to a temperature-sensing NTC RT1 in series with an adjust resistor R6. The NTC can be tracked to the required hot-spot location, or it can be wired with flying leads to the required hotspot.
Track the RT1 return to GND as directly as possible back to the GND pin of the device. RT1 should not be connected to a power GND track or plane, in order to minimize error in the trip level.
The device internally filters the SD pin, so an external filter capacitor is not usually required. If the application design requires an external capacitor, limit the value to 1 nF maximum.