PRODUCT DATASHEET
AAT2552178
SystemPower
TM
Total Power Solution for Portable Applications
Typical Characteristics–Step-Down Converter
Efficiency vs. Load
(V
OUT
= 3.3V; L = 5.6µH)
100
1.0
DC Regulation
(V
OUT
= 3.3V; L = 5.6µH)
V
IN
= 3.6V
Output Error (%)
90
Efficiency (%)
80
70
60
50
40
0.1
1
V
IN
= 5.0V
V
IN
= 4.2V
0.5
V
IN
= 5.0V
0.0
-0.5
V
IN
= 4.2V
V
IN
= 3.6V
10
100
1000
-1.0
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
Efficiency vs. Load
(V
OUT
= 1.8V; L = 3.3µH)
100
1.0
DC Regulation
(V
OUT
= 1.2V; L = 1.5μH)
V
IN
= 3.6V
Output Error (%)
90
Efficiency (%)
V
IN
= 2.7V
V
IN
= 5.0V
V
IN
= 4.2V
0.5
V
IN
= 3.6V
V
IN
= 5.0V
80
70
60
50
40
0.1
1
10
100
1000
0.0
-0.5
V
IN
= 4.2V
V
IN
= 2.7V
-1.0
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
Efficiency vs. Load
(V
OUT
= 1.2V; L = 1.5µH)
100
90
1.0
DC Regulation
(V
OUT
= 1.2V; L = 1.5μH)
Output Error (%)
Efficiency (%)
V
IN
= 3.6V
V
IN
= 2.7V
V
IN
= 5.0V
V
IN
= 4.2V
0.5
V
IN
= 3.6V
V
IN
= 5.0V
80
70
60
50
40
0.1
0.0
-0.5
V
IN
= 4.2V
V
IN
= 2.7V
1
10
100
1000
-1.0
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
2552.2008.02.1.2
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