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AC vs. DC AC refers to current that changes in magnitude and polarity (orientation) with time. DC is characterized by current that does not change in polarity over time.
Power Supply IC TypesThere are two main types of power supply ICs: linear regulators and switching regulators.
Linear RegulatorAs its name suggests, a linear regulator is one where a linear component (such as a resistive load) is used to regulate the output.
Switching RegulatorA switching regulator is a voltage regulator that uses a switching element to transform the incoming power supply into a pulsed voltage, which is then smoothed using capacitors, inductors, and other elements.