Power management integrated circuit

A power management integrated circuit, comprising:

• an I2C interface circuit that is coupled with a logic pin of the integrated circuit and communicates with an external host controller to receive regulation parameters set by the host controller;
• and
• a driving circuit that converts a switching signal into a driving signal and applies the driving signal to a control terminal of a power switch in the power management integrated circuit, and that regulates power transmission from the input terminal to an output terminal of the power management integrated circuit by controlling on and off states of the power switch to provide a stable output voltage, the switching signal being obtained according to the regulation parameters, wherein the driving circuit comprises:
• a buffer having an input terminal for receiving the switching signal;
• a first totem pole circuit and a second totem pole circuit that are coupled with each other in parallel for charging and discharging a control terminal of the power switch according to an output of the buffer;
• and
• a driving control unit that receives a first regulation signal, controls a signal path between the second totem pole circuit and the buffer according to the first regulation signal, and adjusts a driving speed of the driving circuit by enabling or disabling the second totem pole circuit.