Operation description

SRK2001A

16/20

DocID029495 Rev 1

7.7

Layout guidelines

The GND pin is the return of the bias current of the device and return for gate drive currents:

it should be routed to the common point where the source terminals of both synchronous

rectifier MOSFETs are connected. When laying out the PCB, care must be taken in keeping

the source terminals of both SR MOSFETs as close to one another as possible and routing

the trace that goes to the GND separately from the load current return path. This trace

should be as short as possible and be as close to the physical source terminals as possible.

Doing the layout as more geometrically symmetrical as possible will help make the circuit

operation as much electrically symmetrical as possible.

Also drain-source voltage sensing should be done as physically close to the drain and

source terminals as possible in order to minimize the stray inductance involved by the load

current path that is in the drain-to-source voltage sensing circuit.

be the low-ESR, low-ESL type and located as close to the IC pins as possible. Sometimes,

a series resistor (in the tens