SIC620 datasheet(14/20 Pages) VISHAY

14 / 20 page

SiC620, SiC620A

www.vishay.com

Vishay Siliconix

S14-2385-Rev. E, 08-Dec-14

Document Number: 62922

For technical questions, contact: powerictechsupport@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

Multi-Phases VRPower PCB Layout

Following is an example for 6 phase layout. As can be seen, all the VRPower stages are lined in X-direction compactly with

decoupling caps next to them. The inductors are placed as close as possible to the SiC620 and SiC620A to minimize the PCB

copper loss. Vias are applied on all PADs (VIN, PGND, CGND) of the SiC620 and SiC620A to ensure that both electrical and thermal

performance are excellent. Large copper planes are used for all the high current loops, such as VIN, VSWH, VOUT and PGND. These

copper planes are duplicated in other layers to minimize the inductance and resistance. All the control signals are routed from

the SiC620 and SiC620A to a controller placed to the north of the power stage through inner layers to avoid the overlap of high

current loops. This achieves a compact design with the output from the inductors feeding a load located to the south of the

design as shown in the figure.

Fig. 29 - Multi - Phase VRPower Layout Top View

Fig. 30 - Multi - Phase VRPower Layout Bottom View

VOUT

PGND

VIN

PGND

VOUT

SIC620 Datasheet(PDF) 14 Page - Vishay Siliconix