RT8256 データシートの表示（PDF） - Richtek Technology
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RT8256 Datasheet PDF : 12 Pages
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RT8256
Input capacitor must CIN
be placed as close
to the IC as possible.
VIN
L1
SW
CB
NC
BOOT
2
VIN
3
SW
4
D1
GND
CC
The feedback and
compensation components
must be connected as close
to the device as possible.
8
EN
CP
RC
7
COMP
6
FB R1
5
GND
VOUT
R2
COUT
VOUT
SW should be connected to inductor by
wide and short trace. Keep sensitive
components away from this trace.
Figure 4. PCB Layout Guide
GND
Table 2. Suggested Inductors for Typical Application Circuit
Component Supplier
Series Dimensions (mm)
TDK
SLF12555T 12.5x12.5x5.5
TAIYO YUDEN
NR8040
8x8x4
TDK
SLF12565T 12.5x12.5x6.5
Table 3. Suggested Capacitors for CIN and COUT
Location Component Supplier
Part No.
CIN
MURATA
GRM31CR61E106K
CIN
CIN
COUT
COUT
COUT
TDK
TAIYO YUDEN
MURATA
TDK
TAIYO YUDEN
C3225X5R1E106K
TMK316BJ106ML
GRM32ER61E226M
C3225X5R0J226M
EMK325BJ226MM
Capacitance (μF)
10
10
10
22
22
22
Case Size
1206
1206
1206
1210
1210
1210
Table 4. Suggested Diode
Component Supplier Series
DIODES
B330A
PANJIT
SK23
VRRM (V)
30
30
IOUT (A)
3
2
Package
SMA
DO-214AA
DS8256-01 March 2011
www.richtek.com
11
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