LM2596R datasheet(7/11 Pages) ETC1

7 / 11 page

3.0A, 15V, Step-Down Switching Regulator

LM2596

HTC

Test Circuit and Layout Guidelines

As in any switching regulator, layout is very important. Rapidly switching currents associated with wiring inductance can

generate voltage transients which can cause problems. For minimal inductance and ground loops, the wires indicated by

heavy lines should be wide printed circuit traces and should be kept as short as possible. For best results, external

components should be located as close to the switcher lC as possible using ground plane construction or single point

grounding.

If open core inductors are used, special care must be taken as to the location and positioning of this type of inductor. Allowing

the inductor flux to intersect sensitive feedback, lC groundpath and COUT wiring can cause problems.

When using the adjustable version, special care must be taken as to the location of the feedback resistors and the

associated wiring. Physically locate both resistors near the IC, and route the wiring away from the inductor, especially an open

core type of inductor.

Figure 2. Typical Test Circuits and Layout Guide

Oct 2004 - Rev 0

LM2596R Datasheet(PDF) 7 Page - List of Unclassifed Manufacturers