AAT1142 Datasheet, PDF (8/22 Pages) Advanced Analogic Technologies – 800mA Voltage-Scaling Step-Down Converter

AAT1142
800mA Voltage-Scaling Step-Down Converter
Typical Characteristics
P-Channel R_DS(ON) vs. Input Voltage
450
125°C
400
100°C
350
85°C
300
25°C
250
200
2.5
3
3.5
4
4.5
5
5.5
6
6.5
Input Voltage (V)
N-Channel R_DS(ON) vs. Input Voltage
450
400
125°C
350
100°C
85°C
300
250
200
25°C
150
2.5
3
3.5
4
4.5
5
5.5
6
6.5
Input Voltage (V)
Load Transient Response
(10mA to 400mA; V_IN = 3.6V; V_OUT = 1.2V)
1.4
2.6
1.3
2.4
1.2
2.2
1.1
2.0
1.0
1.8
0.9
1.6
0.8
1.4
0.7
1.2
0.6
1.0
0.5
0.8
0.4
0.6
0.3
0.4
0.2
0.2
0.1
0.0
0.0
-0.2
Time (50µs/div)
Load Transient Response
(400mA to 800mA; V_IN = 3.6V; V_OUT = 1.0V)
1.2
3.0
1.1
2.8
1.0
2.6
0.9
2.4
0.8
2.2
0.7
2.0
0.6
1.8
0.5
1.6
0.4
1.4
0.3
1.2
0.2
1.0
0.1
0.8
0.0
0.6
-0.1
0.4
-0.2
0.2
Time (50µs/div)
No Load Quiescent Current vs. Input Voltage
(V_OUT = 1.8V)
60
55
50
85°C
45
25°C
40
35
-40°C
30
25
20
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
Line Response
(V_OUT = 1.2V; I_OUT = 650mA)
0.2
6.0
0.1
5.5
0.0
5.0
-0.1
4.5
-0.2
4.0
-0.3
3.5
-0.4
3.0
Time (500µs/div)
8
1142.2006.07.1.0