Voltage converter
View Patent ↗There is provided a voltage converter capable of reliably preventing malfunctions of an electronic circuit to stably maintain an accurate operation by suppressing high-frequency noise generated on an input side. A DC-DC converter 1 as a voltage converter includes an active component embedded substrate 2 having an IC chip 7 and an input-side capacitor Cin and an output-side capacitor Cout mounted thereon, and ground layers 33 G- 1 and 33 G- 2 and a ground layer 32 G are formed therein so as to interpose the IC chip 7 therebetween. The input-side capacitor Cin is connected to the ground layer 33 G- 1 , and the output-side capacitor Cout is connected to the ground layer 33 G- 2 . Moreover, the ground layer 32 G is connected to the terminals of the IC chip 7 , and the input-side capacitor Cin and the output-side capacitor Cout are connected to each other by the ground layers 33 G- 1 and 33 G- 2.
1. A voltage converter comprising:
a substrate having an active component embedded therein;
an input-side capacitor and an output-side capacitor which are mounted on the substrate and connected to a predetermined ground potential and which include a ground-side terminal; and
a first conductor layer and a second conductor layer which are formed so as to interpose the active component therebetween and connected to a predetermined ground potential, wherein:
the first conductor layer includes an input-side conductor layer which is connected to a ground-side terminal of the input-side capacitor, and an output-side conductor layer which is provided separately from the input-side conductor layer and connected to a ground-side terminal of the output-side capacitor;
the second conductor layer is connected to terminals of the active component;
a ground-side terminal of the input-side capacitor is connected to the second conductor layer through the input-side conductor layer; and
a ground-side terminal of the output-side capacitor is connected to the second conductor layer through the output-side conductor layer.
2. The voltage converter according to claim 1 ,
wherein the active component is disposed so that the terminals of the active component face a side opposite to the input-side capacitor.
3. The voltage converter according to claim 1 ,
wherein the output-side conductor layer has an unevenness on a surface thereof and is formed so as to cover the active component.
4. The voltage converter according to claim 1 ,
wherein the output-side conductor layer has a plurality of holes which is formed at predetermined intervals.
5. The voltage converter according to claim 1 ,
wherein the ground-side terminal of the input-side capacitor is connected to the predetermined ground potential at one position.
6. The voltage converter according to claim 1 ,
wherein the ground-side terminal of the output-side capacitor is connected to the predetermined ground potential at a plurality of positions.