Samsung patents circuit design to stop power surges in electronics

1. A buck converter comprising: a power switching circuit including a high side (HS) switch and a low side (LS) switch, the power switching circuit configured to alternately transfer an input voltage and a ground voltage to an output terminal through the HS switch and the LS switch in response to a pulse switching signal; an inductor having a first end connected to the output terminal and a second end connected to a load capacitor, the inductor configured to generate an output voltage at the second end; a sensing voltage generator configured to generate a first voltage and a second voltage, the sensing voltage generator including: a first resistor and a first capacitor connected in series between the output terminal and the second end of the inductor, the first voltage being a voltage at a first common node between the first resistor and the first capacitor; and a second resistor and a second capacitor connected in series between the first common node and the second end of the inductor, the second voltage being a voltage at a second common node between the second resistor and the second capacitor; and an overshooting detector configured to generate a switching off signal in response to a first reference voltage, the first voltage and the second voltage, and generate the first reference voltage based on replicating a current flowing through the first common node during a half of a turn-on time interval of the HS switch, the power switching circuit is further configured to based on the switching off signal being in a first state, the HS switch and the LS switch are alternately turned on in response to the pulse switching signal, and based on the switching off signal being in a second state, the LS switch is turned off.