PRODUCT DATASHEET
AAT2550178
SystemPowerTM
Total Power Solution for Portable Applications
Typical Characteristics — Step-Down Converter (continued)
Soft Start
(VIN = 3.6V; VOUT = 1.8V; IOUT = 400mA)
Line Regulation
(VOUT = 1.8V)
0.40
0.30
0.20
0.10
0.00
-0.10
-0.20
-0.30
-0.40
5.0
4.0
3.0
2.0
1.0
0.0
VEN
VO
IOUT = 10mA
0.6
0.4
0.2
0.0
-0.2
-0.4
IOUT = 1mA
IOUT = 400mA
IL
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Time (100μs/div)
Input Voltage (V)
Output Voltage Error vs. Temperature
(VIN = 3.6V; VO = 1.8V; IOUT = 400mA)
Switching Frequency vs. Temperature
(VIN = 3.6V; VOUT = 1.8V)
2.0
1.0
15.0
12.0
9.0
6.0
3.0
0.0
0.0
-3.0
-6.0
-9.0
-12.0
-15.0
-1.0
-2.0
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
Temperature (°C)
Temperature (°°C)
Frequency vs. Input Voltage
No Load Quiescent Current vs. Input Voltage
2.0
1.0
50
45
40
35
VOUT = 1.8V
0.0
25°C
85°C
-1.0
-2.0
-3.0
-4.0
30
25
20
15
10
VOUT = 2.5V
VOUT = 3.3V
-40°C
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
w w w . a n a l o g i c t e c h . c o m
2550.2008.02.1.3
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ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
