DocID026803 Rev 1

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AN4569

Layout

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4

Layout

4.1

Decoupling



Use electrolytic capacitors first to separate the Vcc branches;

Figure 19. Electrolytic capacitor



Minimize the path between the Vcc pins and ground pin in order to avoid inductive

paths;



Vcc routing. The purpose of a "star routing" for the Vcc supply is in order to avoid the

interference between different signals such as part A idle and another part B working

with full load. Under this condition the interference would evidently happen if no star

connection were implemented.

Figure 21. Star connection