Switching regulator and control circuit and control method thereof

A control circuit of a switching regulator, wherein the switching regulator is configured to operably convert an input voltage to an output voltage, and include:

• a power stage circuit including a high-side switch, a low-side switch, and an inductor coupled with one another, the power stage circuit being configured to operably convert the input voltage to the output voltage by operating the high-side switch and the low-side switch according to a high-side signal and a low-side signal respectively, and generate an inductor current flowing through the inductor;
• and the control circuit, which is coupled to the power stage circuit;
• the control circuit comprising:
• a switching signal generation circuit, which is coupled to the power stage circuit, and is configured to operably generate the high-side signal and the low-side signal according to a command signal;
• and
• an adjustment signal generation circuit, which is coupled to the power stage circuit and the switching signal generation circuit, and is configured to operably provide an adjustment level according to the high-side signal, the low-side signal, and/or the inductor current, wherein the adjustment level is electrically connected to an isolation region of the low-side switch;
• wherein the adjustment level is switched between a reverse recovery level and an anti-latch-up level;
• wherein the reverse recovery level is lower than the input voltage;
• wherein the anti-latch-up level is higher than the reverse recovery level to avoid a latch-up effect.

A control method of a switching regulator, comprising:

• generating a high-side signal and a low-side signal according to a command signal;
• operating a high-side switch and a low-side switch in a power stage circuit according to a high-side signal and a low-side signal respectively to convert an input voltage to an output voltage, and generating an inductor current flowing through an inductor in the power stage circuit, wherein the high-side switch, the low-side switch, and the inductor are coupled with one another;
• and
• providing an adjustment level according to the high-side signal, the low-side signal, and/or the inductor current, wherein the adjustment level is electrically connected to an isolation region of the low-side switch;
• wherein the adjustment level is switched between a reverse recovery level and an anti-latch-up level;
• wherein the reverse recovery level is lower than the input voltage;
• wherein the anti-latch-up level is higher than the reverse recovery level to avoid a latch-up effect.