Switching regulator and electronic device including the same

An electronic system including:

• at least one processing circuit;
• and
• a switching regulator configured to provide a supply voltage to the processing circuit, the switching regulator including,
• a first converting stage including at least one first output capacitor connected between a first output node and ground and at least one first inductor, and configured to generate a first output voltage on the first output node,
• a second converting stage including at least one second output capacitor connected between a second output node and the ground and at least one second inductor, and configured to generate a second output voltage on the second output node, and
• a switch element configured to selectively connect the first output node of the first converting stage to the processing circuit,
• wherein the second output node is configured to connect to the processing circuit,
• a capacitance of the first converting stage is greater than that of the second converting stage,
• the switching regulator is configured to provide at least one of the first output voltage or the second output voltage to the processing circuit as the supply voltage depending on an on or off state of the switch element, and
• one end of the switch element is connected to the first output node and the other end of the switch element is connected to the second output node.

A switching regulator configured to generate an output voltage from at least one of a first input voltage and a second input voltage and output the output voltage through an output terminal, the switching regulator comprising:

• a first converting stage comprising a first output capacitor connected between a first output node and ground, the first converting stage configured to receive the first input voltage and adjust a level of the output voltage using the first input voltage;
• a second converting stage comprising a second output capacitor connected between a second output node connected to the output terminal and the ground, the second converting stage configured to receive the second input voltage and adjust the level of the output voltage using the second input voltage, the second output node being connected to the output terminal;
• and
• a first switch element connected between the first output node and the output terminal, the first switch element configured to selectively connect the first converting stage to the output terminal,
• wherein a capacitance of the second output capacitor is smaller than that of the first output capacitor,
• the switching regulator is configured to output as the output voltage at least one of a first output voltage generated by the first converting stage on the first output node and a second output voltage generated by the second converting stage on the second output node, depending on an on or off state of the first switch element, and
• one end of the first switch element is connected to the first output node and the other end of the first switch element is connected to the second output node.