Voltage converter with combined buck converter and capacitive voltage divider

TLDR: In this article, a voltage converter including a buck converter and a capacitive voltage divider is described. But the converter is not a voltage amplifier, it is a switch circuit, an inductor and a controller, and the inductor controls the duty cycle of the PWM signal to regulate the second output voltage.

Abstract: A voltage converter including a buck converter and a capacitive voltage divider. The converter includes four capacitors, a switch circuit, an inductor and a controller. A first capacitor is coupled between a reference node and a first output node which develops a first output voltage. A second capacitor is coupled between an input node and either the reference node or the first output node. The switch circuit couples a third capacitor between the reference and first output nodes in a first state of a PWM signal, and couples the third capacitor between the first output and input nodes in a second PWM signal state. The inductor is coupled to the third capacitor and provides a second output node coupled to the fourth capacitor providing a second output voltage. The controller controls the duty cycle of the PWM signal to regulate the second output voltage to a predetermined level.