AAT1143 Datasheet, PDF (5/20 Pages) Advanced Analogic Technologies – 1MHz 400mA Step-Down Converter

Typical Characteristics
Efficiency vs. Load
(V_OUT = 2.5V; L = 4.7µH)
100
V_IN = 3.0V ^VIN ^{= 3.3V}
90
80
V_IN = 3.6V
70
60
0.1
1
10
100
Output Current (mA)
AAT1143
1MHz 400mA Step-Down Converter
1000
2.0
1.0
0.0
-1.0
-2.0
0.1
Load Regulation
(V_OUT = 2.5V; L = 4.7µH)
V_IN = 3.0V
V_IN = 3.3V
V_IN = 3.6V
1
10
100
1000
Output Current (mA)
Efficiency vs. Load
(V_OUT = 1.8V; L = 4.7µH)
100
2.0
90 ^{VIN = 2.7V}
V_IN = 3.6V
1.0
80
0.0
70
V_IN = 4.2V
-1.0
60
50
0.1
1
10
100
Output Current (mA)
1000
-2.0
0.1
DC Regulation
(V_OUT = 1.8V; L = 4.7µH)
V_IN = 4.2V
V_IN = 2.7V
V_IN = 3.6V
1
10
100
1000
Output Current (mA)
Frequency vs. Input Voltage
(V_OUT = 1.8V)
1.0
Output Voltage Error vs. Temperature
(V_IN = 3.6V; V_O = 1.5V)
2.0
0.5
1.0
0.0
-0.5
INTERNAL DO^0.0 CUMENT
-1.0
-1.5
DO NOT COPY ^-1.0
-2.0
-2.0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
-40
-20
0
20
40
60
80
100
Input Voltage (V)
Temperature (°C)
1143.2005.09.1.7
5