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