| 摘要 |
A transistor is coupled to a load so that an input voltage is applied to the load therethrough. A comparator compares a load-side voltage of the transistor with a reference voltage. A control circuit is operable to deactivate the transistor when the comparator detects that the load-side voltage is lower than the reference voltage. The transistor is so configured as to operate in a non-saturated region when an overcurrent flows in the load, so that the load-side voltage thereof becomes lower than the reference voltage.
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