PRODUCT DATASHEET
AAT1
153
2A Step-Down Converter
Typical Characteristics
Efficiency vs. Output Current
(V
OUT
= 1.2V, T
A
= 25°C, L = 2.2µH, C
IN
= C
OUT
= 22µF)
100
90
80
1.236
DC Regulation
(V
OUT
= 1.2V, T
A
= 25°C, L = 2.2µH, C
IN
= C
OUT
= 22µF)
Efficiency (%)
70
60
50
40
30
20
10
0
0.1
V
IN
= 3.6V
V
IN
= 2.5V
Output Voltage (V)
V
IN
= 4.2V
1.224
1.212
1.200
1.188
1.176
1.164
0
V
IN
= 4.2V
V
IN
= 5.0V
V
IN
= 5.5V
V
IN
= 5.5V
V
IN
= 5.0V
V
IN
= 2.5V
V
IN
= 3.6V
1
10
100
1000
10000
200
400
600
800
1000 1200 1400 1600 1800 2000
Output Current (mA)
Output Current (mA)
Quiescent Current vs. Input Voltage
(T
A
= 25°C, L = 2.2µH, C
IN
= C
OUT
= 22µF)
0.38
400
Quiescent Current vs. Temperature
(L = 2.2µH, C
IN
= C
OUT
= 22µF)
Quiescent Current (µA)
0.36
Input Current (mA)
0.34
0.32
0.30
0.28
0.26
0.24
0.22
0.20
2.5
3.0
3.5
V
OUT
= 3.3V
350
V
IN
= 4.2V
V
OUT
= 3.3V
V
IN
= 3.6V
V
OUT
= 1.8V
V
OUT
= 1.8V
300
250
4.0
4.5
5.0
5.5
200
-40
-20
0
20
40
60
80
100
Input Voltage (V)
Temperature (°C)
Line Regulation
(V
OUT
= 1.8V, L = 2.2µH, C
IN
= C
OUT
= 22µF)
0.40
Accuracy (%)
0.20
I
OUT
= 1A
I
OUT
= 600mA
I
OUT
= 1mA
I
OUT
= 1.5A
0.00
-0.20
I
OUT
= 2A
-0.40
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
6
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1153.2008.02.1.2
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