RT8073
Typical Application Circuit
V
IN
VIN
C
IN1
10µF
Chip Enable
C
IN2
10µF
RT8073
R
PG
100k
PGOOD
EN
C
SS
10nF R
T
28.7k
CHF*
R
C
C
C
* : Option
SS
RT
COMP
PGND
R
FB1
GND
FB
R
FB2
LX
C
OUT1
10µF
C
OUT2
10µF
C
OUT3
47µF to
100µF
BOOT
C
BOOT
0.1µF
L
V
OUT
Table 1. Recommended Component Selection
V
OUT
(V)
3.3
2.5
1.8
1.5
1.2
1
R
FB
(kΩ)
75
51
30
21
12
6
R
FB2
(kΩ)
24
24
24
24
24
24
R
C
(kΩ)
33
24
18
15
12
10
C
C
(nF)
0.33
0.47
0.56
0.68
1
1
L (μH)
0.47
0.47
0.47
0.33
0.33
0.33
C
OUT
Cer. 20μF + E-Cap 100μF
Cer. 20μF + E-Cap 100μF
Cer. 20μF + E-Cap 100μF
Cer. 20μF + E-Cap 100μF
Cer. 20μF + E-Cap 100μF
Cer. 20μF + E-Cap 100μF
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS8073-01
November 2012
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
