Rev 4.0

32

PD-97528

IR3856MPbF

PCB Metal and Components Placement

PCB metal pad sizing (all dimensions in mm)

PCB metal pad spacing (all dimensions in mm)

Evaluations have shown that the best overall performance is achieved using the substrate/PCB layout

as shown in following figures. PQFN devices should be placed to an accuracy of 0.050mm on both X

and Y axes. Self-centering behavior is highly dependent on solders and processes, and experiments

should be run to confirm the limits of self-centering on specific processes. For further information,

please refer to “SupIRBuck™ Multi-Chip Module (MCM) Power Quad Flat No-Lead (PQFN) Board