MP2617A, MP2617B

– SINGLE CELL SWITCHING CHARGER WITH POWER PATH

MP2617A, MP2617B Rev. 1.23

www.MonolithicPower.com

29

1/15/2018

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3) The PCB should have a ground plane

connected

directly

to

the

return

of

all

components

through

vias

(two

vias

per

capacitor for power-stage capacitors, one via

per capacitor for small-signal components). It is

also recommended to put vias inside the PGND

pads for the IC, if possible. A star ground

design approach is typically used to keep circuit

block currents isolated (high-power/low-power

small-signal) which reduces noise-coupling and

ground-bounce issues. A single ground plane

for this design gives good results. With this

small layout and a single ground plane, there is

no

ground-bounce

issue,

and

having

the

components segregated minimizes coupling

between signals.