Multi-output Switching regulator and control method therefor

A multi-output switching regulator, comprising:

• a single-input-multiple-output voltage converter converting an input voltage to a first output voltage at a first node and a second output voltage at a second node;
• an input capacitor connected with the input voltage at an input node;
• a first output capacitor having two ends, one of which is connected with the first node;
• and
• a second output capacitor having two ends, one of which is connected with the second node;
• wherein the other end of the first output capacitor is switchable among ground, the input node, and the second node.

A multi-output switching regulator, comprising:

• a single-input-multiple-output voltage converter converting an input voltage to a first output voltage at a first node and a second output voltage at a second node;
• an input capacitor connected with the input voltage at an input node;
• a first output capacitor having two ends, one of which is connected with the first node;
• and
• a second output capacitor having two ends, one of which is connected with the second node;
• wherein the other end of the second output capacitor is switchable among ground, the input node, and the first node.

A method for controlling a multi-output switching regulator, comprising:

• providing a single-input-multiple-output voltage converter, the single-input-multiple-output voltage converter converting an input voltage to a first output voltage at a first node and a second output voltage at a second node;
• providing an input capacitor connected with the input voltage at an input node;
• providing a first output capacitor having two ends, one of which is connected with the first node;
• providing a second output capacitor having two ends, one of which is connected with the second node;
• and
• connecting the other end of the first output capacitor and the other end of the second output capacitor by one of the following forms:
• (1) the other end of the first output capacitor being connected to ground, and the other end of the second output capacitor being connected to the input node;
• (2) the other end of the first output capacitor being connected to ground, and the other end of the second output capacitor being connected to the first node;
• (3) the other end of the first output capacitor being connected to the input node, and the other end of the second output capacitor being connected to ground;
• (4) the other end of the first output capacitor being connected to the input node, and the other end of the second output capacitor being connected to the input node;
• (5) the other end of the first output capacitor being connected to the input node, and the other end of the second output capacitor being connected to the first node;
• (6) the other end of the first output capacitor being connected to the second node, and the other end of the second output capacitor being connected to ground;
• or
• (7) the other end of the first output capacitor being connected to the second node, and the other end of the second output capacitor being connected to the first node.