V Datasheet, PDF (13/14 Pages) Continental Device India Limited – SOT-23 Formed SMD Package

RT8288
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.
C_IN
GND
SW should be connected
to inductor by wide and
short trace and keep
sensitive components
away from this trace.
VIN
SW
SW
BOOT
8
2
7
GND
3
6
9
4
5
GND
VCC _RT
FB
EN
R2 _{Place the feedback}
as close to the IC as
R1 ^possible.
L
C_BOOT
V_OUT
C_OUT
GND
V_OUT
Figure 7. PCB Layout Guide
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS8288-03 June 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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