PRODUCT DATASHEET
AAT2146
SwitchReg
TM
Typical Characteristics
Line Regulation
(V
OUT
= 1.8V)
0.4
0.3
Low Noise, Fast Transient 600mA Step-Down Converter
Switching Frequency vs. Temperature
(V
OUT
= 1.8V; I
OUT
= 1A)
1mA
400mA
600mA
Switching Frequency (MHz)
5.5
0.5
2.08
2.06
2.04
2.02
2
1.98
1.96
1.94
1.92
-40
-15
10
35
60
85
Accuracy (%)
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
2.7
3.1
3.5
3.9
4.3
4.7
5.1
Input Voltage (V)
Input Voltage (V)
Frequency Variation vs. Input Voltage
4
3
2
1
0
-1
-2
-3
-4
2.7
3.1
3.5
3.9
4.3
4.7
2.0
Output Voltage Error vs. Temperature
(V
IN
= 3.6V; V
O
= 1.8V, I
OUT
= 400mA)
Output Voltage Error (%)
Frequency Variation (%)
1.0
0.0
-1.0
V
OUT
= 1.8V
V
OUT
= 3V
5.1
5.5
-2.0
-40
-20
0
20
40
60
80
100
Input Voltage (V)
Temperature (°C)
No Load Quiescent Current vs. Input Voltage
60
P-Channel R
DS(ON)
vs. Input Voltage
550
500
Supply Current (µA)
55
50
40
35
30
25
20
15
10
2.7
3.1
3.5
3.9
4.3
4.7
5.1
85°C
25C
-40°C
5.5
45
R
DS(ON)
(mΩ)
Ω
450
400
350
300
250
200
2.5
3
3.5
4
4.5
5
120°C
100°C
85°C
25°C
5.5
6
Input Voltage (V)
Input Voltage (V)
6
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2146.2008.10.1.2
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