Dual-mode switching regulator

A dual-mode switching regulator comprising:

• a comparison unit comparing an input voltage input through an input terminal with a pre-set reference voltage and outputting a comparison result signal;
• a switching signal generation unit generating a regulator selection signal for controlling a previously connected regulator path and a bypass selection signal for controlling a previously connected bypass path according to the comparison result signal;
• a regulator included in the regulator path and converting the input voltage to a pre-set voltage;
• a regulator path selection unit switching the regulator path including the regulator between the input terminal and an output terminal on or off, according to the regulator selection signal;
• and
• a bypass path selection unit switching the bypass path connecting the input terminal and the output terminal without passing through the regulator on or off, according to the bypass selection signal,
• wherein the regulator path selection unit includes:
• a first switching device connected between the input terminal and the regulator, and switched off when the input voltage is lower than the reference voltage and switched on when the input voltage is equal to or higher than the reference voltage, according to the regulator selection signal;
• and
• a second switching device connected between the regulator and the output terminal and switched off when the input voltage is lower than the reference voltage and switched on when the input voltage is equal to or higher than the reference voltage, according to the regulator selection signal, and
• the bypass path selection unit includes a third switching device formed on the bypass path between the input terminal and the output terminal, and switched on when the input voltage is lower than the reference voltage and switched off when the input voltage is equal to or higher than the reference voltage, according to the bypass selection signal.