Circuits and methods for hybrid 3:1 voltage regulators

1. A circuit for a voltage regulator, comprising:

an inductor having a first side coupled to an input voltage and having a second side;

a first flying capacitor having a first side and having a second side;

a second flying capacitor having a first side and having a second side; and

a plurality of switches,

wherein:

in a first state, the plurality of switches connect:

the second side of the inductor to the second side of the first flying capacitor and an output node;

the first side of the first flying capacitor to the first side of the second flying capacitor; and

the second side of the second flying capacitor to a voltage supply,

in a second state, the plurality of switches connect:

the second side of the inductor to the first side of the second flying capacitor;

the second side of the second flying capacitor to the output node and the first side of the first flying capacitor; and

the second side of the first flying capacitor to the voltage supply.

2. The circuit of claim 1 , wherein the voltage supply is a ground.

3. The circuit of claim 1 , wherein each switch is a MOSFET.

4. The circuit of claim 1 , further comprising a controller that controls the switches to switch between the first state and the second state.

5. The circuit of claim 1 , further comprising an output capacitor.