EVK-ACT8945AQJ303-T Datasheet, PDF (34/42 Pages) Active-Semi, Inc – Advanced PMU for Atmel SAMA5D3 Series & SAM9 Series Processors

nodes of the DC/DCs.
REFBP is a noise-filtered reference, and internally
has a direct connection to the linear regulator
controller. Any noise injected onto REFBP will
directly affect the outputs of the linear regulators,
and therefore special care should be taken to
ensure that no noise is injected to the outputs via
REFBP. As with the LDO output capacitors, the
REFBP bypass capacitor should be placed as close
to the IC as possible, with short, direct connections
to the star-ground. Avoid the use of via whenever
possible. Noisy nodes, such as from the DC/DCs,
should be routed as far away from REFBP as
possible.
ACT8945A
Rev 2, 11-Feb-14
Innovative Power^TM
- 34 -
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