BOOT

VSENSE

PH

VIN

GND

EN

Vout

PH

Vin

TOPSIDE

GROUND

AREA

OUTPUT

INDUCTOR

OUTPUT

FILTER

CAPACITOR

BOOT

CAPACITOR

INPUT

BYPASS

CAPACITOR

CATCH

DIODE

SignalVIA

RouteBOOT CAPACITOR

traceonotherlayertoprovide

widepathfortopsideground

RESISTOR

DIVIDER

Feedback Trace

COMP

SS

COMPENSATION

NETWORK

ThermalVIA

SLOWSTART

CAPACITOR

UVLO

RESISTOR

DIVIDER

ELECTROMAGNETIC INTERFERENCE (EMI) CONSIDERATIONS

TPS54331

Figure 14. TPS54331 Board Layout

As EMI becomes a rising concern in more and more applications, the internal design of the TPS54331 takes

measures to reduce the EMI. The high-side MOSFET gate drive is designed to reduce the PH pin voltage

ringing. The internal IC rails are isolated to decrease the noise sensitivity. A package bond wire scheme is used

to lower the parasitics effects.

To achieve the best EMI performance, external component selection and board layout are equally important.

Follow the Step by Step Design Procedure above to prevent potential EMI issues.

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