PRODUCT DATASHEET
AAT1
153
2A Step-Down Converter
Typical Characteristics
Efficiency vs. Output Current
(V
OUT
= 3.3V, T
A
= 25°C, L = 2.2µH, C
IN
= C
OUT
= 22µF)
100
90
80
DC Regulation
(V
OUT
= 3.3V, T
A
= 25°C, L = 2.2µH, C
IN
= C
OUT
= 22µF)
3.399
V
IN
= 4.2V
Output Voltage (V)
V
IN
= 3.7V
V
IN
= 5.5V
V
IN
= 5.0V
3.366
3.333
3.300
3.267
3.234
3.201
Efficiency (%)
70
60
50
40
30
20
10
0
0.1
V
IN
= 5.5V
V
IN
= 5.0V
V
IN
= 3.7V
V
IN
= 4.2V
1
10
100
1000
10000
0
200
400
600
800
1000 1200 1400 1600 1800 2000
Output Current (mA)
Output Current (mA)
Efficiency vs. Output Current
(V
OUT
= 1.8V, T
A
= 25°C, L = 2.2µH, C
IN
= C
OUT
= 22µF)
100
90
80
1.854
DC Regulation
(V
OUT
= 1.8V, T
A
= 25°C, L = 2.2µH, C
IN
= C
OUT
= 22µF)
70
60
50
40
30
20
10
Output Voltage (V)
Efficiency (%)
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.5V
V
IN
= 5.0V
V
IN
= 5.5V
1.836
1.818
1.800
1.782
1.764
1.746
V
IN
= 4.2V
V
IN
= 5.0V
V
IN
= 5.5V
V
IN
= 3.6V
V
IN
= 2.5V
0
0.1
1
10
100
1000
10000
0
200
400
600
800
1000 1200 1400 1600 1800 2000
Output Current (mA)
Output Current (mA)
Efficiency vs. Output Current
(V
OUT
= 1.5V, T
A
= 25°C, L = 2.2µH, C
IN
= C
OUT
= 22µF)
100
90
80
1.545
DC Regulation
(V
OUT
= 1.5V, T
A
= 25°C, L = 2.2µH, C
IN
= C
OUT
= 22µF)
Efficiency (%)
70
60
50
40
30
20
10
V
IN
= 3.6V
V
IN
= 2.5V
V
IN
= 5.5V
V
IN
= 5.0V
Output Voltage (V)
V
IN
= 4.2V
1.530
1.515
1.500
1.485
1.470
1.455
V
IN
= 4.2V
V
IN
= 5.0V
V
IN
= 5.5V
V
IN
= 3.6V
V
IN
= 2.5V
0
0.1
1
10
100
1000
10000
0
200
400
600
800
1000 1200 1400 1600 1800 2000
Output Current (mA)
Output Current (mA)
1153.2007.11.1.1
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