AAT1147 Datasheet, PDF (6/18 Pages) Advanced Analogic Technologies – High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter

DATA SHEET
AAT1147
High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter
Typical Characteristics
Line Regulation
(V_OUT = 3.3V)
0.5
0.4
0.3
0.2 ^{IOUT = 10mA IOUT = 1mA}
0.1
0
-0.1
-0.2
-0.3
I_OUT = 400mA
-0.4
-0.5
3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0
Input Voltage (V)
Line Regulation
(V_OUT = 2.5V)
0.5
0.4
0.3
0.2 ^{IOUT = 10mA IOUT = 1mA}
0.1
0.0
-0.1
-0.2
-0.3
I_OUT = 400mA
-0.4
-0.5
3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0
Input Voltage (V)
Line Regulation
(V_OUT = 1.8V)
0.5
0.4
0.3
0.2
0.1 _{IOUT = 10mA IOUT = 1mA}
0.0
-0.1
-0.2
-0.3
-0.4
I_OUT = 400mA
-0.5
3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0
Input Voltage (V)
Frequency vs. Input Voltage
2.0
1.0
0.0 VOUT = 1.8V
-1.0
-2.0
V_OUT = 2.5V V_OUT = 3.3V
-3.0
-4.0
2.5
2.9
3.3
3.7
4.1
4.5
4.9
5.3
Input Voltage (V)
Output Voltage Error vs. Temperature
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 400mA)
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-40 -25 -10 5
20 35 50 65 80 95
Temperature (°C)
Switching Frequency vs. Temperature
(V_IN = 3.6V; V_OUT = 1.8V)
15
12
9
6
3
0
-3
-6
-9
-12
-15
-40 -25 -10 5
20 35 50 65 80 95
Temperature (°C)
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201986A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 23, 2012