AIC1633
ꢀAPPLICATION EXAMPLES
(CONTINUED)
L1
100
80
50µH
100Ω
VIN=8V
+VIN
R4
1N4148
D5
VOUT
(+5V)
VIN=12V
VIN=16V
VIN=20V
100K
R3
1N4148
D4
0.1µF
C2
60
Q4
10K
R2
R1
4.3K
9014
Q2
+
ILIM\SD VOUT
+
40
20
0
+
Q1
9014
ZD1
5.1V
220µF
C4
C1
100µF
VIN
LBI
IRFZ34
C3
10µF
D3
1N4148
Q3
LBO
SW
D1
9014
MBR360
CGND
SGND
0.005
0.05
5
Load Curr0e.n5t (mA)
AIC1633-5
1N4148
D2
Fig. 6 Boost-Driven 5V Output Step-Down Converter
+VOUT
+VIN
470Ω
R1
ILIM/SD VOUT
+
22µF
C1
VIN
LBI
LOAD
R1
R2
SW
LBO
FB
GND
+
22µF
AIC1631A
1N5819
D1
C2
Fig.7 Adjustable Output Voltage Step-Up Converter
9