SLUSCM5A August 2017 – February 2018 UCC24612
UCC24612 needs a sufficient external bypass capacitance to ensure the internal regulator stability. Referring to the power supply recommendation section, a 2.2-µF 50-V ceramic capacitor was chosen as the bypass capacitor on REG pin. For the VDD pin, it is normally powered by the output voltage and there is plenty of capacitor there. A 0.1-µF ceramic capacitor is still recommended to be placed close to the IC to provide high frequency current.