PRODUCT DATASHEET
AAT1
153
2A Step-Down Converter
Typical Characteristics
P-Channel R
DS(ON)
vs. Input Voltage
200
180
150
N-Channel R
DS(ON)
vs. Input Voltage
85°C
25°C
R
DS(ON)_N
(mΩ)
Ω
130
110
90
70
50
2.5
85°C
R
DS(ON)_P
(mΩ)
Ω
160
140
120
100
80
2.5
25°C
-40°C
-40°C
3
3.5
4
4.5
5
5.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Input Voltage (V)
Switching Frequency vs. Temperature
(V
IN
= 3.6V; V
OUT
= 1.8V)
Switching Frequency (MHz)
1.4
0.609
0.607
0.605
0.603
0.601
0.599
0.597
0.595
0.593
Reference Voltage vs. Temperature
(V
IN
= 3.6V)
1.3
1.2
1.1
Reference Voltage (V)
-20
0
20
40
60
80
100
1.0
-40
0.591
-40
-20
0
20
40
60
80
100
Temperature (°C)
Temperature (°C)
Soft Start
(V
IN
= 3.6V; V
OUT
= 1.8V; I
OUT
= 2A; C
FF
= 22pF)
Enable Voltage (top) (V)
Output Voltage (middle) (V)
6
4
2
0
-2
1.4
1.0
0.6
0.2
-0.2
2.2
2.0
1.8
1.6
Load Transient Response
(V
IN
= 3.6V; V
OUT
= 1.8V; L = 2.2µH; C
IN
= C
OUT
= 22µF)
Output Current (bottom) (A)
Output Voltage (top) (V)
Input Current
(bottom) (A)
2A
200mA
2.6
2.2
1.8
1.4
1.0
0.6
0.2
-0.2
Time (400µs/div)
Time (400µs/div)
1153.2007.11.1.1
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