| 摘要 |
A switching power supply circuit (1) that supplies a power supply voltage to a load via a transmission line (PL) is provided with: a voltage conversion unit (11), which has an input voltage (VIN) and a control signal (Vc) inputted thereto, and which converts the input voltage (VIN) into an output voltage (Vo) at a level corresponding to the control signal (Vc), and outputs the output voltage to the transmission line (PL); a signal generating unit (12), which monitors a load current (ILOAD) flowing in the transmission line (PL), and which generates a signal corresponding to a voltage that drops in the transmission line (PL); and a low-pass filter (13) that outputs, to the voltage conversion unit (11) as the control signal (Vc), the signal generated by means of the signal generating unit (12). |
