RT8272 RICHTEK [Richtek Technology Corporation], RT8272 Datasheet - Page 11

• Manufacturer Part Number: RT8272
• Description: 3A, 24V, 1.2MHz 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
DS8272-02 March 2011
Component Supplier
Component Supplier
Component Supplier
TAIYO YUDEN
TAIYO YUDEN
TAIYO YUDEN
GOTERND
MURATA
MURATA
DIODES
DIODES
PANJIT
PANJIT
TDK
TDK
TDK
The output capacitor must be
placed near the RT8272.
Input capacitor must be placed
as close to the IC as possible.
RLF7030
Series
B330A
NR8040
SW should be connected to inductor by
GSSR2
Series
SK33
SK34
B340
GRM31CR61E106K
GRM31CR60J476M
wide and short trace. Keep sensitive
C3225X5R1E106K
C3225X5R0J476M
EMK325BJ476MM
TMK316BJ106ML
components away from this trace.
C
OUT
Part No.
V
GND
OUT
IN
V
and C
Inductance ( H)
RRM
30
40
30
40
C
Figure 4. PCB Layout Guide
IN
(V)
L
V
OUT
IN
4.7
4.7
4.7
D1
SW
I
BOOT
OUT
GND
Capacitance ( F)
VIN
SW
CB
3
3
3
3
(A)
DCR (m )
10
10
10
47
47
47
2
3
4
31
18
18
GND
DO-214AC
The resistor divider must be connected
DO-214AB
DO-214AB
DO-214AB
Package
as close to the device as possible.
C
8
7
6
5
SS
Current Rating (A)
V
SS
EN
COMP
FB
OUT
Case Size
COMP and FB traces must be
The parallel distance between
C
1206
1206
1206
1206
1210
1210
P
3.5
4.7
5.7
as short as possible.
GND
C
C
R
C
Dimensions (mm)
7.3 x 6.8 x 3.2
10 x 10 x 3.8
RT8272
www.richtek.com
8 x 8 x 4
11