RT8269 RICHTEK [Richtek Technology Corporation], RT8269 Datasheet - Page 11

• Manufacturer Part Number: RT8269
• Description: 3A, 24V, 400kHz Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

Table 2. Suggested Inductors for Typical Application Circuit
Table 3. Suggested Capacitors for C
Table 4. Suggested Diode
DS8269-02 March 2011
Component Supplier
Component Supplier
Component Supplier
TAIYO YUDEN
TAIYO YUDEN
TAIYO YUDEN
MURATA
MURATA
MURATA
DIODES
DIODES
PANJIT
PANJIT
TDK
TDK
TDK
TDK
The output capacitor must be
placed near the IC.
Input capacitor must be placed
as close to the IC as possible.
VLF10045
NR8040
Series
Series
B330A
SW should be connected to inductor by
SK33
SK34
B340
GRM32ER71C226M
GRM31CR61E106K
GRM31CR60J476M
wide and short trace. Keep sensitive
C3225X5R1C226M
C3225X5R1E106K
C3225X5R0J476M
EMK325BJ476MM
components away from this trace.
TMK316BJ106ML
C
OUT
Part No.
V
GND
OUT
Inductance ( H)
IN
V
and C
RRM
30
40
30
40
C
Figure 4. PCB Layout Guide
IN
10
10
(V)
L1
V
OUT
IN
D1
SW
I
BOOT
OUT
GND
VIN
SW
Capacitance ( F)
CB
3
3
3
3
(A)
DCR (m )
2
3
4
10
10
10
47
47
47
22
22
25
34
GND
The resistor divider must be connected
DO-214AC
DO-214AB
DO-214AB
DO-214AB
Package
as close to the device as possible.
C
8
7
6
5
S
Current Rating (A) Dimensions (mm)
V
SS
EN
COMP
FB
OUT
Case Size
The parallel distance between
COMP and FB traces must be
C
P
1206
1206
1206
1206
1210
1210
1210
1210
4.3
3.4
as short as possible.
GND
C
C
R
C
10 x 9.7 x 4.5
RT8269
8 x 8 x 4
www.richtek.com
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