RT8287 Просмотр технического описания (PDF) - Richtek Technology
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RT8287 Datasheet PDF : 14 Pages
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RT8287
Layout Considerations
Follow the PCB layout guidelines for optimal performance
of the IC.
` Keep the traces of the main current paths as short and
wide as possible.
` Put the input capacitor as close as possible to the device
pins (VIN and GND).
` SW node is with high frequency voltage swing and
should be kept at small area. Keep analog components
away from the SW node to prevent stray capacitive noise
pickup.
` Connect feedback network behind the output capacitors.
Keep the loop area small. Place the feedback
components near the IC.
` Connect all analog grounds to a common node and then
connect the common node to the power ground behind
the output capacitors.
` An example of PCB layout guide is shown in Figure 7
for reference.
Place the input and output
capacitors as close to the
IC as possible.
GND
CIN
SW should be
connected to
inductor by wide
and short trace and
keep sensitive
components away
from this trace.
L
VIN 1
SW 2
SW 3
CBOOT
SW 4
SW 5
BOOT 6
EN 7
14 AGND
13 GND
12 GND
CSS
GND
15
11 VCC
10 SS
9 PGOOD
8 FB
RT
R2 Place the
feedback as
close to the IC
R1 as possible.
VOUT
GND
COUT
VOUT
Figure 7. PCB Layout Guide
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS8287-03 June 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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