# US 2010/0164282 A1 · Multi-output Switching regulator and control method therefor

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- Number: US 2010/0164282 A1
- Document ID: US20100164282A1
- Status: Published application
- Kind: A1
- Application number: 12/592,760
- Filed: 2009-12-02
- Published: 2010-07-01
- Earliest claimed: 2008-12-26
- Assignees: Richtek Technology Corporation
- Inventors: Ching-Jung Tseng; Jui-Li Lan; Jing-Meng Liu
- Web page: https://patentgrep.com/patent/US20100164282A1

## CPC

- H02M 3/158: including plural semiconductor devices as final control devices for a single load
- H02M 1/009: {having two or more independently controlled outputs (for DC-DC converter with intermediate AC H02M3/33561)}
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)

## Abstract

The present invention discloses 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 connected to ground, the input node or the second node, and the other end of the second output capacitor is connected to ground, the input node or the first node.

## Claims

### Claim 1

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 and the other end of the second output capacitor are connected 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.

### Claim 2

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.

### Claim 3

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.

### Claim 4 (depends on 3)

The multi-output switching regulator of claim 3, wherein the other end of the first output capacitor is switchable among ground, the input node, and the second node.

### Claim 5

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.

### Claim 6 (depends on 5)

The method of claim 5, further comprising:
(a) connecting the other end of the first output capacitor and the other end of the second output capacitor by anyone of the forms listed in (1)-(7);
(b) connecting both the other end of the first output capacitor and the other end of the second output capacitor to ground; and
(c) switching the connections of the other end of the first output capacitor and the other end of the second output capacitor between (a) and (b).