Time-multiplexed-capacitor DC/DC converter with multiple outputs

摘要

A multiple output DC-to-DC voltage converter using a new time-multiplexed-capacitor converter algorithm and related circuit topologies is herein disclosed. One embodiment of this invention includes a flying capacitor, a first output node, a second output node, and a switching network. The switching network configured to provide the following modes of circuit operation: 1) a first mode where the positive electrode of the flying capacitor is connected to an input voltage and the negative electrode of the flying capacitor is connected to ground; 2) a second mode where the negative electrode of the flying capacitor is connected to the input voltage and the positive electrode of the flying capacitor is connected to the first output node; and 3) a third mode where the positive electrode of the flying capacitor is connected to ground and the negative electrode of the flying capacitor is connected to the second output node.

主权项

1. A multiple output charge pump comprising:
a first flying capacitor having a positive electrode and a negative electrode; a second flying capacitor having a positive electrode and a negative electrode; a first output node to provide a first voltage having a first polarity to a first output capacitor; a second output node, distinct from the first output node, to provide a second voltage different than the first voltage to a second output capacitor, the second voltage having the first polarity; a third output node, distinct from the first output node and the second output node, to provide a third voltage different than the first voltage and the second voltage to a third output capacitor, the third voltage having a second polarity opposite the first polarity; and a switching network configured to provide a first mode where the first and second flying capacitors are connected in series or in parallel between an input voltage (VIN) and ground, a second mode where the first and second flying capacitors are connected in series, and a third mode.