RT7237C
Typical Application Circuit
V
IN
4.5V to 18V
Chip Enable
7 EN
8 SS
C
SS
0.1µF
4, 9 (Exposed Pad)
GND
2
C
IN
10µF x 2
VIN
BOOT
RT7237C
SW 3
1
C
BOOT
L
0.1µF 6.8µH
R1
75k
FB 5
COMP
6
C
C
3.3nF
R
C
17k
R2
24k
V
OUT
3.3V
C
OUT
22µF x 2
C
P
Open
Table 1. Suggested Components Selection
V
OUT
(V)
8
5
3.3
2.5
1.5
1.2
1
R1 (kΩ)
27
62
75
25.5
10.5
12
3
R2 (kΩ)
3
11.8
24
12
12
24
12
R
C
(kΩ)
40
25
17
13
7
6
5
C
C
(nF)
3.3
3.3
3.3
3.3
3.3
3.3
3.3
L (μH)
15
10
6.8
4.7
3.6
2
2
C
OUT
(μF)
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS7237C-04
November 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
