RT7272B
Input capacitor must be placed
as close to the IC as possible.
V
V
OUT
IN
C
OUT
C
IN
The R resistor must be connected
L
SW should be connected to
as close to the device as possible.
Keep sensitive components away.
inductor by wide and short trace.
Keep sensitive components
C *
S
R *
S
L
away from this trace and C
.
BOOT
R
L
8
7
6
5
SW
BOOT
EN
VIN
C
V
BOOT
2
3
4
RLIM
COMP
FB
R
C
GND
C
C
C
IN
9
R
EN
GND
P
R1
V
OUT
R2
The R component
EN
must be connected.
GND
The Compensator and feedback
components must be connected as
close to the device as possible.
* : Option
Figure 8. PCB Layout Guide
Table 3. Suggested Capacitors for CIN and COUT
Location
CIN
Component Supplier
Part No.
Capacitance (F)
Case Size
1206
MURATA
TAIYO YUDEN
TDK
GRM32ER71H475K
UMK325BJ475MM-T
C3225X5R1E106K
TMK316BJ106ML
GRM31CR60J476M
C3225X5R0J476M
GRM32ER71C226M
C3225X5R1C22M
4.7
4.7
10
10
47
47
22
22
CIN
1206
CIN
1206
CIN
TAIYO YUDEN
MURATA
TDK
1206
COUT
COUT
COUT
COUT
1206
1210
MURATA
TDK
1210
1210
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14
DS7272B-05 June 2015
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
