AAT2550_08 Datasheet, PDF (7/34 Pages) Advanced Analogic Technologies – Total Power Solution for Portable Applications

SystemPower^TM
PRODUCT DATASHEET
AAT2550178
Total Power Solution for Portable Applications
Typical Characteristics — Step-Down Converter (continued)
Soft Start
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 400mA)
5.0
4.0 V_EN
V_O
3.0
2.0
1.0
0.0
0.6
0.4
0.2
I_L
0.0
-0.2
-0.4
Time (100μs/div)
Line Regulation
(V_OUT = 1.8V)
0.40
0.30
0.20
I_OUT = 10mA
0.10
0.00
-0.10
-0.20
-0.30
I_OUT = 1mA
I_OUT = 400mA
-0.40
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
Output Voltage Error vs. Temperature
(V_IN = 3.6V; V_O = 1.8V; I_OUT = 400mA)
2.0
1.0
0.0
-1.0
-2.0
-40
-20
0
20
40
60
Temperature (°C)
80
100
Switching Frequency vs. Temperature
(V_IN = 3.6V; V_OUT = 1.8V)
15.0
12.0
9.0
6.0
3.0
0.0
-3.0
-6.0
-9.0
-12.0
-15.0
-40
-20
0
20
40
60
80
100
Temperature (°C)
Frequency vs. Input Voltage
2.0
1.0 _{VOUT = 1.8V}
0.0
-1.0
V_OUT = 2.5V
V_OUT = 3.3V
-2.0
-3.0
-4.0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
No Load Quiescent Current vs. Input Voltage
50
45
40
35 _85°C 25°C
30
25
20
15 ^-40°C
10
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
2550.2008.02.1.3
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