AIC1633
APPLICATION EXAMPLES
(CONTINUED)
+V
OUT
(+3V)
+V
IN
470Ω
R1
85
V
IN
=1.6V
80
LOAD
+
1N5819
D1
L1
100µH
10µF
C1
Efficiency (%)
ILIM/SD
VIN
SW
SGND
VOUT
LBI
LBO
CGND
V
IN
=1.4V
V
IN
=1.0V
V
IN
=0.8V
V
IN
=1.2V
75
70
65
+
22µF
C2
AIC1633-3
60 0
5
10
15
20
25
30
35
Load Current (mA)
Start-Up V
IN
Voltage = 1.4V
Fig. 3
1-Cell Input 3V Output Step-Up Converter
2SB1424
Q1
+V
IN
470Ω
R1
150µH
L1
+
C2
10µF
15K
10K
R
ILIM
ILIM/SD
VIN
SW
+
C1
22µF
SGND
1N5819
D1
VOUT
LBI
LBO
CGND
20K
R4
10µF
R5
R2
3.3K
R3
62K
90
+V
OUT
(+5V)
85
V
IN
=5V
V
IN
=6V
V
IN
=3V
V
IN
=3.5V
V
IN
=4.5V
V
IN
=4V
Efficiency (%)
+
80
C4
75
LOAD
70
0
V
IN
=7V
20
40
60
80
100 120 140
160 180 200 220 240
AIC1633-5
Load Current (mA)
Fig. 4
+V
IN
1K
R1
1K
R2
10µF +
C2
+
10µF
C1
1K
R3
2SB1424
Q1
1N5819
D1
82µH
L1
4-Cell Input Step-Up/ Step-Down Converter
+V
OUT
(+3V)
33K
R4
+
22µF
C3
24K
R5
LOAD
100
V
IN
=3V
95
ILIM/SD
VIN
SW
SGND
VOUT
LBI
LBO
CGND
Efficiency (%)
90
V
IN
=4V
V
IN
=5V
85
80
V
IN
=7V
V
IN
=6V
0
20
40
60
80
100
120
140
160
180
200
220
AIC1633-3
75
V
OUT
Ripple May Be Large at V
IN
=3V Condition
Load Current (mA)
Fig. 5 3-Cell Input 3V Output Step-Down Converter
8
AIC [ ANALOG INTERGRATIONS CORPORATION ]
