| 摘要 |
PROBLEM TO BE SOLVED: To provide a voltage regulator consuming less current. SOLUTION: The voltage regulator includes: an overcurrent protection circuit 91 having a first sense transistor 14 sensing output current of an output transistor 15, and controlling the output transistor 15 such that an output voltage Vout of the voltage regulator becomes low when the first sense transistor 14 detects overcurrent of the output transistor 15; and a voltage control circuit 92 operating such that a drain voltage of the output transistor 15 and a drain voltage of the first sense transistor 14 become equal. The voltage control circuit 92 has current circuits 22, 23 supplying start current for starting the voltage control circuit 92, and restricts the start current supplied by the current circuits 22, 23 according to the output current of the output transistor 15. COPYRIGHT: (C)2010,JPO&INPIT |
