AAT2120_08 Datasheet, PDF (6/19 Pages) Advanced Analogic Technologies – 500mA Low Noise Step-Down Converter

SwitchReg^TM
Typical Characteristics
Soft Start
(V_IN = 3.6V; V_OUT = 1.8V; 500mA)
4
1.4
V_O
3 _VEN
1.2
2
1.0
1
0.8
0
0.6
-1
0.4
-2
I_LX
0.2
-3
0.0
-4
-0.2
Time (100µs/div)
Output Voltage Error vs. Temperature
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 500mA)
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
-40
-20
0
20
40
60
Temperature (°C)
80
100
Switching Frequency Variation vs. Temperature
(V_IN = 3.6V; V_OUT = 1.8V)
10
8
6
4
2
0
-2
-4
-6
-8
-10
-40
-20
0
20
40
60
80
100
Temperature (°C)
PRODUCT DATASHEET
AAT2120
500mA Low Noise Step-Down Converter
Line Regulation
(V_OUT = 1.8V)
0.30
0.20
0.10
I_OUT = 10mA
I_OUT = 500mA ^{IOUT = 0mA}
0.00
-0.10
I_OUT = 50mA
I_OUT = 150mA
-0.20
I_OUT = 250mA
-0.30
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
Frequency Variation vs. Input Voltage
4
3
V_OUT = 1.8V
2
1
0
-1
V_OUT = 3.0V
-2
-3
-4
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
60
55
50 _85°C
45
40 ^25°C
35 _-40°C
30
25
20
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
6
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2120.2008.02.1.2