Patent ID: 9711279
Date: 2017-07-18
CPC Classifications: H01F,H01L,H02M,H05K,Y10T

Claim:
1. A DC-DC converter assembly, comprising: a board having a first side and a second side opposite the first side; a power stage die of a DC-DC converter attached to the first side of the board; an output inductor electrically connected to an output of the power stage die and disposed over the power stage die on the first side of the board, the output inductor comprising a magnetic core and an electrical conductor having first and second terminals attached to the first side of the board, the output inductor accommodating the power stage die under the magnetic core so that the power stage die is interposed between the magnetic core and the board; a load attached to the first side of the board; a plurality of input capacitors electrically connected to input terminals of the power stage die, the input capacitors that provide a shortest current commutation loop for the power stage die being attached to the first side of the board and the other input capacitors being attached to the second side of the board; an output capacitor electrically connected between the output inductor and the load, and attached to the second side of the board; and a plurality of decoupling capacitors electrically connected to power terminals of the power stage die, and attached to the second side of the board, wherein a total footprint of the power stage die, the output inductor, the plurality of input capacitors, the output capacitor and the plurality of decoupling capacitors is at least a third of the combined surface area of the power stage die, the output inductor, the plurality of input capacitors, the output capacitor and the plurality of decoupling capacitors.