RT8270 RICHTEK [Richtek Technology Corporation], RT8270 Datasheet - Page 11

• Manufacturer Part Number: RT8270
• Description: 2A, 22V, 1.2MHz Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

Table 4. Suggested Diode
Table 2. Suggested Inductors for Typical Application Circuit
Table 3. Suggested Capacitors for C
DS8270-01 March 2011
Component Supplier
Location
Component Supplier
C
C
C
C
C
C
TAIYO YUDEN
OUT
OUT
OUT
IN
IN
IN
DIODES
PANJIT
TDK
TDK
Component Supplier
Input capacitor must
be placed as close
to the IC as possible.
TAIYO YUDEN
TAIYO YUDEN
MURATA
MURATA
TDK
TDK
SLF12555T
SLF12565T
Series
B330A
NR8040
Series
SK23
V
L1
C
V
OUT
IN
IN
C
SW should be connected to inductor by
wide and short trace. Keep sensitive
components away from this trace.
OUT
IN
V
D1
GRM32ER61E226M
GRM31CR61E106K
and C
Dimensions (mm)
C3225X5R1E106K
C3225X5R0J226M
EMK325BJ226MM
RRM
TMK316BJ106ML
12.5 x 12.5 x 5.5
12.5 x 12.5 x 6.5
SW
BOOT
C
30
30
GND
B
Figure 4. PCB Layout Guide
VIN
SW
(V)
8 x 8 x 4
Part No.
OUT
2
3
4
I
OUT
3
2
(A)
8
7
6
5
EN
NC
COMP
FB
Capacitance (μF)
DO-214AA
R2
Package
R1
SMA
V
OUT
C
10
10
10
22
22
22
C
GND
C
P
GND
R
The feedback and
compensation components
must be connected as close
to the device as possible.
C
Case Size
1206
1206
1206
1210
1210
1210
RT8270
www.richtek.com
11