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PRODUCT DATASHEET
AAT2158
SwitchReg
TM
Typical Characteristics
Efficiency vs. Output Current
(V
OUT
= 3.3V)
100
90
1.5A Low Noise Step-Down Converter
Load Regulation
(V
OUT
= 3.3V)
1.00
0.75
V
IN
= 5.0V
V
IN
= 4.2V
Efficiency (%)
80
70
60
50
40
30
0
1
10
100
1000
10000
V
OUT
Error (%)
0.50
0.25
0.00
-0.25
-0.50
-0.75
-1.00
0.1
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 5.0V
V
IN
= 3.6V
1
10
100
1000
10000
Output Current (mA)
Output Current (mA)
Efficiency vs. Output Current
(V
OUT
= 1.8V)
100
90
1.00
Load Regulation
(V
OUT
= 1.8V)
0.75
V
IN
= 2.7V
V
OUT
Error (%)
V
IN
= 4.2V
V
IN
= 3.6V
Efficiency (%)
80
70
60
50
40
30
0
1
10
100
1000
10000
0.50
0.25
0.00
-0.25
-0.50
-0.75
-1.00
0.1
1
10
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 2.7V
100
1000
10000
Output Current (mA)
Output Current (mA)
Efficiency vs. Output Current
(V
OUT
= 1.2V)
100
90
1.00
0.75
Load Regulation
(V
OUT
= 1.2V)
V
IN
= 2.7V
V
OUT
Error (%)
Efficiency (%)
80
70
60
50
40
30
0
1
10
100
1000
10000
0.50
0.25
0.00
-0.25
-0.50
-0.75
-1.00
0.1
V
IN
= 4.2V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 3.6V
1
10
100
1000
10000
Output Current (mA)
Output Current (mA)
2158.2008.10.1.5
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