rt9218 Richtek Technology Corporation, rt9218 Datasheet - Page 2

• Manufacturer Part Number: rt9218
• Description: 5v/12v Synchronous Buck Dc-dc Linear Power Controller
• Manufacturer: Richtek Technology Corporation

RT9218
Typical Application Circuit
www.richtek.com
2
C5 to C6
1000uF x 2
C1 to C2
1000uF x 2
SV
LV
V
REF
OUT
OUT
:
(0.8V
Internal
2.2uH
=
=
L1
V
V
REF
REF
C3 to C4
1uF x 2
±
2%)
reference
×
R
C
×
(1
(1
MU
ML
Q1
Q2
+
+
R2
R1
R5
R6
PHASE
)
)
voltage
LV
OUT
2.2
Q3
C9
470uF
C7
1uF
R1
4k
1N4148
D1
R2
8k
1
2
3
4
5
6
7
BOOT
UGATE
GND
LGATE
DRV
NC
NC
2.2
RT9218
PGOOD
PHASE
0.1uF
OPS
VCC
C8
FBL
NC
FB
1k/NC
R4
14
13
12
11
10
9
8
68R
R5
0.1uF/NC
C11
C10
1uF
10R
DS9218-08 March 2007
R3
Q4
32R
R6
R
3904
OCSET
PHASE
Disable