Interposer for an integrated DC-DC converter
An interposer electrical interface for placing a DC-DC converter in close proximity with an IC powered by the converter, the DC-DC converter including at least one switching node power supply stage, the at least one switching node power supply stage providing regulated power to the IC, the close proximity of the DC-DC converter and IC allowing for high efficiency in provision of the regulated power from the DC-DC converter to the IC, the interposer electrical interface comprising at least one electrical energy storage element.
1. An interposer electrical interface comprising a substrate between a DC-DC converter and an IC powered by the converter to provide close proximity of the DC-DC converter and IC, the DC-DC converter including at least one switching node power supply stage, the at least one switching node power supply stage providing regulated power to the IC, the close proximity of the DC-DC converter and IC allowing for high efficiency in provision of the regulated power from the DC-DC converter to the IC, the interposer electrical interface further comprising at least one electrical energy storage element within the substrate and in electrical contact to the at least one switching node power supply stage.
2. The interposer electrical interface of claim 1 , wherein the at least one electrical energy storage elements comprises an at least one inductive storage element.
3. The interposer electrical interface of claim 2 , wherein the at least one electrical energy storage element comprises at least one output capacitor connected to the at least one inductive storage element, wherein a combination of the at least one output capacitor and inductive storage element is an LC filter of the DC-DC converter.
4. The interposer electrical interface of claim 2 , wherein the inductive storage element comprises a magnetic material and the substrate comprises a dielectric material.
5. The interposer electrical interface of claim 4 , wherein the magnetic material comprises ferrite.
6. The interposer electrical interface of claim 1 , wherein the IC comprises a multiple core microprocessor having a plurality of processor cores, the DC-DC converter including a plurality of outputs for powering said plurality of processor cores.
7. The interposer electrical interface of claim 1 , further comprising electrical connection at the interposer electrical interface between the converter and the interface and between the interface and the IC.
8. The interposer electrical interface of claim 7 , wherein the electrical connectors comprise solder balls.