24V 100mA Step-Up Converter
Typical Characteristics
Load Transient Response
(V
IN
= 4.2V; I
OUT
= 20mA–60mA; V
OUT
= 18V)
AAT1232
Load Transient Response
(V
IN
= 3.6V; I
OUT
= 20mA–60mA; V
OUT
= 12V)
Inductor Current (A) (bottom)
Inductor Current (A) (bottom)
18.10
1.5
1.2
0.9
0.6
0.3
0.0
-0.3
12.10
1.50
1.20
0.90
0.60
0.30
0.00
-0.30
Output Voltage (V) (top)
Output Voltage (V) (top)
18.05
18.00
17.95
17.90
17.85
17.80
12.05
12.00
11.95
11.90
11.85
11.80
Time (200µs/div)
Time (200µs/div)
P-Channel R
DS(ON)
vs. Input Voltage
300
280
160
140
N-Channel R
DS(ON)
vs. Input Voltage
R
DS(ON)
(mΩ)
R
DS(ON)
(mΩ)
Ω
260
240
220
200
180
160
140
2.5
3
120°C
100°C
120
100
80
60
40
2.5
3
3.5
120°C
100°C
25°C
25°C
85°C
3.5
4
4.5
5
5.5
6
85°C
4
4.5
5
5.5
6
Input Voltage (V)
Input Voltage (V)
Soft Start
(V
IN
= 3.6V; C
IN
= 2.2µF; I
OUT
= 100mA; V
OUT
= 12V)
Enable Voltage (middle) (V)
Output Voltage (top) (V)
16
12
8
4
0
-4
-8
-12
-16
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0.0
-0.4
Input Current
(bottom) (A)
Time (200µs/div)
1232.2006.12.1.3
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
