"SP-Cap" is an excellent choice for DC to DC converter output capacitors for a wide variety of power rails, especially the most power 5 VDC, 3.3 VDC, 2.5 VDC and processor cores which are sub 2 VDC. The 5 VDC power rail can use the 6.3 VDC rated "SP-Cap", while the 4 VDC rated "SP-Cap" can be used on 3.3 VDC and 2.5 VDC power rails. The 2 VDC rated "SP-Cap" is very popular for processor cores which operate typically at 0.9 VDC, 1.2 VDC, 1.5 VDC and 1.9 VDC.