How does a load switch IC operate if overcurrent protection is tripped?

When overcurrent protection is tripped, a load switch IC operates in foldback current control mode. Foldback is a current limiting feature. When the load is short-circuited, foldback reduces the output current (I_OUT) as the output voltage (V_OUT) decreases. When V_OUT = 0 V, foldback limits the output current to a level that is internally determined by the load switch IC. When the overcurrent condition has disappeared, V_OUT returns to the normal level automatically.
Foldback prevents the heating of a load switch IC in the event of overcurrent conditions. Overcurrent protection is tripped when the output current exceeds the rated level. It is thus intended to provide temporary protection. Be sure to shut down a system so that the overcurrent condition does not last for an extended period of time.

Please also refer to the following documents for related explanations.

Application note

• Overcurrent Protection and Reverse Current Blocking of the Load Switch IC
• Basics of Load Switch ICs

FAQ

• How does overcurrent protection work in an LDO regulator?
• How can I suppress inrush current with a load switch IC?

To product list of load switch ICs :

• Over Current limit

Main web page about load switch ICs

• Load Switch ICs

Other information

• e-learning Power Management IC
  
• Overcurrent protection function