DC-DC converter with inductor slew

A DC-DC converter, comprising:

• a converter comprising an inductor and a plurality of transistors and configured to convert an input voltage into a power voltage and output the power voltage to an output terminal;
• a first transistor coupled between an input terminal, to which the input voltage is applied, and a first node, wherein the inductor is coupled between the first node and ground;
• a second transistor coupled between the first node and the first output terminal;
• a plurality of first switch transistors coupled in parallel to a gate electrode of the first transistor;
• and a plurality of second switch transistors coupled in parallel to a gate electrode of the second transistor;
• an input current sensor configured to sense an input current of the converter;
• and
• a controller configured to change a slew rate of an inductor voltage in response to the input current of the converter and a preset reference current,
• wherein the slew rate of the inductor voltage is a rate of change of the inductor voltage per unit time,
• wherein when the sensed input current of the converter is higher than the preset reference current, the controller supplies a first gate control signal to the gate electrode of the first transistor through one of the plurality of first switch transistors or a second gate control signal to the gate electrode of the second transistor through one of the plurality of second switch transistors, and
• wherein when the sensed input current of the converter is lower than the preset reference current, the controller supplies the first gate control signal to the gate electrode of the first transistor through at least two of the plurality of first switch transistors or the second gate control signal to the gate electrode of the second transistor through at least two of the plurality of second switch transistors.