PRODUCT DATASHEET
AAT2550178
SystemPowerTM
Total Power Solution for Portable Applications
Typical Characteristics — Step-Down Converter
Efficiency vs. Load
(VOUT = 1.8V; L = 4.7μH)
DC Regulation
(VOUT = 1.8V)
100
90
80
70
60
50
1.0
0.5
VIN = 2.7V
VIN = 4.2V
VIN = 4.2V
VIN = 3.6V
0.0
VIN = 3.6V
-0.5
-1.0
VIN = 2.7V
0.1
1
1
1
10
100
1000
1000
1000
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
Efficiency vs. Load
(VOUT = 2.5V; L = 6.8μH)
DC Regulation
(VOUT = 2.5V)
100
90
80
70
60
50
1.0
0.5
VIN = 2.7V
VIN = 4.2V
VIN = 5.0V
VIN = 5.0V
VIN = 4.2V
0.0
VIN = 3.6V
VIN = 3.6V
-0.5
-1.0
VIN = 3.0V
0.1
10
100
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
Efficiency vs. Load
(VOUT = 3.3V; L = 6.8μH)
DC Regulation
(VOUT = 3.3V; L = 6.8µH)
100
1.0
0.5
VIN = 3.6V
VIN = 5.0V
VIN = 4.2V
90
80
70
60
50
VIN = 4.2V
0.0
VIN = 5.0V
-0.5
-1.0
VIN = 3.6V
0.1
10
100
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
w w w . a n a l o g i c t e c h . c o m
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2550.2008.02.1.3
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
