AAT1121 Datasheet, PDF (5/20 Pages) Advanced Analogic Technologies – 1.5MHz, 250mA Step-Down Converter

Typical Characteristics
Efficiency vs. Load
(V_OUT = 1.2V; L = 1.5µH)
100
90
V_IN = 2.7V
80 ^VIN ^{= 3.6V}
70
60
V_IN = 4.2V
50
V_IN = 5.0V
40
30
0.1
1
10
100
Output Current (mA)
AAT1121
1.5MHz, 250mA Step-Down Converter
1000
1.0
0.5
0.0
-0.5
-1.0
0.1
DC Load Regulation
(V_OUT = 1.2V; L = 1.5µH)
V_IN = 3.6V
V_IN = 2.7V VIN = 4.2V
1
10
100
1000
Output Current (mA)
Efficiency vs. Load
(V_OUT = 1.8V; L = 3.3µH)
100
V_IN = 2.7V
90
V_IN = 3.6V
80
70
60
V_IN = 4.2V
50
40
0.1
1
10
100
1000
Output Current (mA)
DC Load Regulation
(V_OUT = 1.8V; L = 3.3µH)
1.0
0.5
V_IN = 3.6V
0.0
V_IN = 2.7V
-0.5
V_IN = 4.2V
-1.0
0.1
1
10
100
1000
Output Current (mA)
Efficiency vs. Load
(V_OUT = 3.0V; L = 4.7µH)
100
90 ^{VIN = 3.6V}
80
V_IN = 4.2V
70
V_IN = 5.0V
60
50
40
0.1
1
10
100
1000
Output Current (mA)
1.0
0.5
0.0
-0.5
-1.0
0.1
DC Load Regulation
(V_OUT = 3.0V; L = 4.7µH)
V_IN = 4.2V VIN = 3.6V
V_IN = 5.0V
1
10
100
1000
Output Current (mA)
1121.2006.04.1.0
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