PRODUCT DATASHEET
AAT2153
SwitchReg
TM
Typical Characteristics
Efficiency vs. Output Current
(V
OUT
= 3.3V)
100
1.0
90
80
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
0.1
1
10
100
1000
10000
2.5A Low Noise Step-Down Converter
Load Regulation
(V
OUT
= 3.3V)
V
IN
= 5.0V
V
IN
= 4.5V
V
IN
= 4.2V
70
60
50
40
30
20
10
0
0
1
10
100
V
IN
= 5.0V
V
IN
= 4.5V
V
IN
= 4.2V
1000
10000
Output Current (mA)
Load Regulation (%)
Efficiency (%)
Output Current (mA)
Efficiency vs. Output Current
(V
OUT
= 1.8V)
100
1.0
90
80
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
0.1
1
Load Regulation
(V
OUT
= 1.8V)
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
70
60
50
40
30
20
10
0
0
1
10
100
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
1000
10000
Load Regulation (%)
Efficiency (%)
10
100
1000
10000
Output Current (mA)
Output Current (mA)
Efficiency vs. Output Current
(V
OUT
= 1.2V)
100
1.0
90
80
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
0.1
1
Load Regulation
(V
OUT
= 1.2)
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
70
60
50
40
30
20
10
0
0
1
10
100
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
1000
10000
Load Regulation (%)
Efficiency (%)
10
100
1000
10000
Output Current (mA)
Output Current (mA)
2153.2008.09.1.0
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