Datasheet

+
-
LM3243
VBATT_PA
VIN DC-DC
VBATT
+
_
*
*Proper decoupling on VBATT_PA
is strongly recommended.
*
Star connection at VBATT
VIN
+
-
VBATT_PA
LM3243
www.ti.com SNVS782B –OCTOBER 2010–REVISED FEBRUARY 2013
VBATT Star Supply Connection
Figure 32. Multiple Board Layers - VBATT Supply Star Connection
VBATT Star Connection: It is critically important to use a ‘Star’ connection from VBATT supply to LM3243 PVIN
and from VBATT to PA modules as implementing a ‘daisy chain’ supply connection may add noise to the PA
output.
Figure 33. VBATT Star Connection on VIN and VBATT_PA
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