Correct option is B
The feature where an IC voltage regulator reduces both the output current and voltage under overloading or short-circuit conditions is called fold-back current limiting.
· In this technique, when the output current exceeds a certain threshold, the regulator reduces the current and voltage significantly to prevent damage to the IC or connected components.
· Unlike traditional current limiting, which simply caps the current, fold-back current limiting decreases the current output further as the overload persists, minimizing power dissipation and preventing overheating.
Advantages of Fold-back Current Limiting:
· Reduces power dissipation during overload conditions.
· Protects both the IC and the load from damage.
Applications:
· Used in IC voltage regulators like LM78xx and LM317 series.
· Commonly found in power supply circuits for safety.
