IR3552

40A Integrated PowIRstage

®

www.irf.com | © 2014 International Rectifier

February 19, 2014 | FINAL

17

PCB LAYOUT CONSIDERATIONS

PCB layout and design is important to driver

performance in voltage regulator circuits due to the

high current slew rate (di/dt) during MOSFET

switching.

• Locate all power components in each phase

as close to each other as practically possible

in order to minimize parasitics and losses,

allowing for reasonable airflow.

• Input supply decoupling and bootstrap

capacitors should be physically located close

to their respective IC pins.

• High current paths like the gate driver traces

should be as wide and short as practically

possible.

• The ground connection of the IC should be as

close as possible to the low-side MOSFET

source.

• Use of a copper plane under and around the

IC and thermal vias to connect to buried

copper

layers

improves

the

thermal

performance substantially.

* Contact International Rectifier for a layout example suitable for your specific application.