Power control device and power supply device

A power control device configured to serve as a main controlling agent in a power supply device which generates an output voltage from an input voltage using an output transistor, the power control device comprising:

• an output feedback circuit configured to receive the output voltage or a feedback voltage corresponding to the output voltage to generate a driving signal for the output transistor;
• a current feedback signal generation circuit configured to generate a current feedback signal for adjusting phase characteristics of the output feedback circuit according to an output current of the power supply device, the current feedback signal generated according to a mirror current gained by mirroring the output current;
• and
• a delay circuit configured to delay a change in the mirror current in response to a change in the output current, wherein the current feedback signal generation circuit includes:
• a mirror transistor configured to be driven according to the driving signal so as to generate a mirror current corresponding to the output current;
• and
• a current mirror configured to generate the current feedback signal from the mirror current,
• the current mirror includes a first transistor and a second transistor,
• the delay circuit includes a third resistor and a third capacitor,
• the third resistor is connected between a control terminal of the first transistor and a control terminal of the second transistor, and
• the third capacitor is connected between the control terminal of the second transistor and a constant potential terminal.