RT6908
Typical Application Circuit
L1
6.8µH
D1
Q1
V
AVDD
15.6V
IN
12V
C1
22µF
C2
10µF
C3
C4
C5
120µF
2.2nF
14, 15, 16
4.7nF
LX
10
LXI
GD
35
33
36
9
8
AVIN
C6
1µF
AVDD
C30
330pF
R22
VL
RT6908
220k
C7
1µF
11
COMP
DRVP
R1
VINB1
LXB1
100k
C8
AVDD
10µF
C9
1µF
20
Q2
L2 10µH
V
3.3V
39, 40
I/O
R7
D2
C10
47nF
C14
0.22µF
6.8
C11
C13
22µF x
2
C12
100pF
R2
0.1µF
38
2
47k
R8
6.8
BOOT1
FBB1
LXB1
LX
D3
D4
C19
470pF
R3
15k
R4
120k
R9
6.8
3
C15
0.1µF
COMP1
EN_I2C
C16
0.22µF
C17
22nF
R5
R6
31
R10
6.8
VL
VL
22
CRST
32
30
D5
EN
BOOT2
C18
10µF
V
IN
M1
R27
C21
28
DHB2
C20
10µF
V
35.5V
R10
20k
19
12
GH
L3
4.7µH
0.22µF
VGH
A0
V
29
26
CORE
LXB2
DLB2
V
I/O
1.1V
C22
1nF
C24
22µF
x 3
R14
1.2k
M2
R11
10k
R13
1.5
R16
4.7k
R17
R18
4.7k
4.7k
C23
470pF
6
SCL
SCL
24
23
FBB2
5
4
SDA
RSTB
SDA
R23
24k
R12
24k
C25
1nF
RSTB
COMP2
Q3
C27
10pF
C26
21
18
R20
6.8
47nF
D6
DRVN
C28
0.22µF
R19
100k
R24 33k
25
7
ILIMIT2
VDET
R21
6.8
LXB1
D7
R25 47k
V
I/O
V
GL
VGL
-6V
R26
15k
C29
10µF
AGND PGND
34
1, 13, 17,
41 (Exposed Pad)
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS6908-01 March 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
