![](/html/Anachip/936575/page4.png)
Step-Up DC/DC Converter
Typical Application Circuit
(1) VOUT=5V
1.1V to 5.5V
VIN
ON
OFF
+
47uF
0.1uF
22uH
SHDN
REF
GND
LX
OUT
FB
(2) VOUT=3.3V
1.1V to 3.6V
VIN
ON
OFF
+
47uF
0.1uF
22uH
SHDN
REF
GND
LX
OUT
FB
AP1603
+
47uF
Fixed Output
( 5V )
+47uF
Fixed Output
( 3.3V )
(3) VOUT=Adj
1.1V to 5.5V
VIN
ON
OFF
+
47uF
0.1uF
22uH
SHDN
REF
GND
LX
OUT
FB
R2
VOUT=
VREF
(1+
R1
)
+ Output
R2 47uF
R1
Anachip Corp.
www.anachip.com.tw
Rev.1.0 Jun. 3, 2004
4/8