ir3840 International Rectifier Corp., ir3840 Datasheet - Page 28

• Manufacturer Part Number: ir3840
• Description: Integrated 12a Synchronous Buck Regulator
• Manufacturer: International Rectifier Corp.

02/09/09
Single point
connection between
AGND & PGND,
should be close to
the SupIRBuck, kept
away from noise
sources.
Feedback
trace should
be kept
away form
noise
sources
Analog
Ground
plane
Fig. 25c. IRDC3840 demoboard layout
considerations – Mid Layer 1
Fig. 25b. IRDC3840 demoboard layout
considerations – Bottom Layer
Fig. 25d. IRDC3840 demoboard layout
considerations – Mid Layer 2
Use separate traces
for connecting Boot
cap and Rocset to the
switch node and with
the minimum length
traces. Avoid big
loops.
IR3840MPbF
AGnd
Power
Ground
Plane
PGnd
Vin
28