SSM3302

Data Sheet

Rev. A | Page 18 of 20

POWER SUPPLY DECOUPLING

To ensure high efficiency, low total harmonic distortion, and high

power supply rejection ratio, proper power supply decoupling

is necessary. Noise transients on the power supply lines are

short-duration voltage spikes. These spikes can contain frequency

components that extend into the hundreds of megahertz. Decouple

the power supply input with a good quality, low ESL, low ESR

bulk capacitor larger than 220 µF. This capacitor bypasses low

frequency noises to the ground plane.

For high frequency transient noises, place two separate 1 µF

capacitors as close as possible to the PVDD pins of the device.

Connect one of the 1 µF capacitors between the left-side PVDD

terminals and PGND terminals, and connect the other 1 µF

capacitor between the right-side PVDD terminals and PGND

terminals. Placing the decoupling capacitor as close as possible

to the SSM3302 helps to achieve the best performance.