The input current limiting function automatically limits current during a short-circuit condition. The device regulates the average input current for as long as the short-circuit condition exists. If the output voltage falls below 1.25 V typically, the short circuit protection is activated. For input current limit settings of 100 mA, 50 mA and 25 mA, the short circuit protection limits the input current to 26 mA on average. For input current limit setting of 10 mA, 5 mA, 2.5 mA, and 1 mA, the short circuit protection limits the input current to slightly above the typical values for each setting. Table 7-4 shows the typical short circuit currents for each input current limit setting.

The device automatically restarts to previous operation after the short condition is removed.