| 摘要 |
According to the present invention, there is provided a DC-DC converter converting input voltage into output voltage, including: an inductor having one terminal connected to the input voltage; a switch connected to the other terminal of the inductor and performing a switching behavior based on input of a periodic pulse signal; a monitor circuit detecting occurrence of overcurrent by converting a value of current flowing in the inductor into a monitor voltage value and comparing the monitor voltage value with a reference voltage value; a cancel out circuit fluctuating the reference voltage value so that the reference voltage value has negative correlation with fluctuation of the input voltage; and a regulator circuit fluctuating the reference voltage value so that the reference voltage value has positive correlation with fluctuation of a set value of the output voltage.
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