Power module with stacked structure and capacitor assembly layer

A power module, comprising:

• a first layer comprising a first plurality of capacitors, a second plurality of capacitors, and a plurality of connecting pillars, wherein the first plurality of capacitors are electrically connected in parallel between an input node and a reference ground, and the second plurality of capacitors are electrically connected in parallel between an output node and the reference ground;
• a second layer comprising a lower surface attached to the first layer, an upper surface opposite the lower surface, a first pair of switches, and a second pair of switches, wherein the first pair of switches are electrically connected between the input node and the reference ground, and the second pair of switches are electrically connected between the input node and the reference ground;
• and
• an inductor assembly attached to the upper surface of the second layer, comprising a first inductor and a second inductor, wherein the first inductor is electrically connected between the output node and a first switch node formed by the first pair of switches, and the second inductor is electrically connected between the output node and a second switch node formed by the second pair of switches.

A power module, comprising:

• a capacitor assembly layer disposed at bottom of the power module, comprising a bottom substrate, a first plurality of capacitors, and a second plurality of capacitors, wherein the first plurality of capacitors and the second plurality of capacitors are disposed on the bottom substrate, and wherein the first plurality of capacitors are electrically connected in parallel between an input node and a reference ground, and the second plurality of capacitors are electrically connected in parallel between an output node and the reference ground;
• a first pair of switches electrically connected between the input node and the reference ground;
• a second pair of switches electrically connected between the input node and the reference ground;
• and
• an inductor assembly disposed at top of the power module, comprising a magnetic core, a first winding at least partially embedded in the magnetic core, and a second winding at least partially embedded in the magnetic core, wherein the first winding is electrically connected between an output node and a first switch node formed by the first pair of switches, and the second winding is electrically connected between the output node and a second switch node formed by the second pair of switches.