| 摘要 |
Provided is a voltage regulator capable of securely preventing a reverse current from an output terminal (122) with lower current consumption, irrespective of magnitude of a voltage of a VDD terminal (121). Such a configuration is adopted that the voltage of the VDD terminal (121) and a voltage of the output terminal (122) of the voltage regulator are compared with each other with the use of a voltage generated between a transistor and a constant current circuit, to thereby reduce current consumption of a backup battery. Besides, such a configuration is also adopted that a gate of an output transistor is connected with the output terminal (122) based on an output of a comparator circuit, to thereby prevent the reverse current securely.
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