rt9218b Richtek Technology Corporation, rt9218b Datasheet - Page 2

• Manufacturer Part Number: rt9218b
• Description: Synchronous Buck Dc-dc Linear Power Controller
• Manufacturer: Richtek Technology Corporation

RT9218B
Typical Application Circuit
www.richtek.com
2
C5 to C6
1000uF x 2
SV
LV
V
REF
OUT
OUT
C1 to C2
1000uF x 2
:
(0.8V
Internal
=
=
V
V
REF
2.2uH
REF
L1
±
1%)
reference
×
×
(1
C3 to C4
1uF x 2
(1
+
+
R
C
R2
R1
R5
R6
MU
ML
Q1
Q2
)
)
voltage
PHASE
LV
OUT
2.2
Q3
C9
470uF
1uF
C7
R1
4k
1N4148
D1
8k
R2
1
2
3
4
5
6
7
BOOT
UGATE
GND
LGATE
DRV
NC
NC
2.2
RT9218B
PGOOD
PHASE
OPS
VCC
FBL
0.1uF
NC
1k/NC
FB
C8
R4
14
13
12
11
10
9
8
68R
R5
0.1uF/NC
C11
C10
1uF
10R
DS9218B-09 March 2007
R3
Q4
32R
R6
R
3904
OCSET
PHASE
Disable