RT7248
Typical Application Circuit
V
IN
4.5V to 18V
2
C
IN
10µF
R
EN
100k
VIN
BOOT
RT7248
SW 3
7 EN
8 SS
GND
1
C
BOOT
L
100nF 10µH
R1
26.1k
FB 5
COMP
6
C
C
3.3nF
R
C
13k
R2
10k
V
OUT
3.3V/2A
C
OUT
22µF x 2
C
SS
0.1µF
4, 9 (Exposed Pad)
C
P
Open
Table 1. Recommended Component Selection
V
OUT
(V) R1 (kΩ)
8
5
3.3
2.5
1.8
1.2
76.8
45.3
26.1
16.9
9.53
3
R2 (kΩ)
10
10
10
10
10
10
R
C
(kΩ)
27
20
13
9.1
5.6
3.6
C
C
(nF)
3.3
3.3
3.3
3.3
3.3
3.3
L (μH)
22
15
10
6.8
4.7
3.6
C
OUT
(μF)
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
DS7248-01
September 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
