PRODUCT DATASHEET
AAT1153
2A Step-Down Converter
Typical Characteristics
P-Channel RDS(ON) vs. Input Voltage
N-Channel RDS(ON) vs. Input Voltage
200
150
130
110
90
180
85°C
85°C
160
25°C
140
25°C
120
-40°C
70
-40°C
100
80
50
2.5
3
3.5
4
4.5
5
5.5
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Input Voltage (V)
Switching Frequency vs. Temperature
(VIN = 3.6V; VOUT = 1.8V)
Reference Voltage vs. Temperature
(VIN = 3.6V)
1.4
1.3
1.2
1.1
1.0
0.609
0.607
0.605
0.603
0.601
0.599
0.597
0.595
0.593
0.591
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
Temperature (°C)
Temperature (°C)
Soft Start
(VIN = 3.6V; VOUT = 1.8V; IOUT = 2A; CFF = 22pF)
Load Transient Response
(VIN = 3.6V; VOUT = 1.8V; L = 2.2µH; CIN = COUT = 22µF)
6
4
2.2
2.0
1.8
1.6
2
0
-2
2.6
2A
1.4
1.0
0.6
0.2
-0.2
2.2
1.8
1.4
1.0
200mA
0.6
0.2
-0.2
Time (400µs/div)
Time (400µs/div)
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1153.2007.11.1.1
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ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
