Load regulation refers to the ability of a voltage regulator to maintain a constant voltage as the load current varies and is expressed as a percentage. Ideally, the load regulation would be zero percent meaning that the output voltage is perfectly independent of the load current. The equation for load regulation is as follows.
The function of current limiting circuitry is to prevent damage to the IC when an overload is placed on the output of the regulator (the load impedance is too low). Without current limiting, the regulator would source excessive load current and destroy the pass transistor inside the part.
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