PRODUCT DATASHEET
AAT1141
SwitchReg
TM
Typical Characteristics
Soft Start
(V
IN
= 3.6V; V
OUT
= 1.8V; Load = 3Ω; C
FF
= 100pF)
0.5
0.4
Fast Transient 600mA Step-Down Converter
Line Regulation
(V
OUT
= 1.8V)
I
OUT
= 10mA
I
OUT
= 600mA
Output Voltage (V)
EN
(2V/div)
V
OUT
(2V/div)
0V
0.3
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
2.5
3.0
3.5
4.0
4.5
5.0
0V
I
IN
(200mA/div)
0mA
5.5
6.0
Time (100μs/div)
Input Voltage (V)
Output Voltage Error vs. Temperature
(V
IN
= 3.6V; V
O
= 1.8V; I
OUT
= 400mA)
2.0
Switching Frequency vs. Temperature
(V
IN
= 3.6V; V
OUT
= 1.8V)
10.00
Frequency Variation (%)
8.00
6.00
4.00
2.00
0.00
-2.00
-4.00
-6.00
-8.00
-10.00
-40
-20
0
20
40
60
80
100
Output Error (%)
1.0
0.0
-1.0
-2.0
-40
-20
0
20
40
60
80
100
°
Temperature (°C)
Temperature (°C)
°
Frequency vs. Input Voltage
2.0
No Load Quiescent Current vs. Input Voltage
(V
OUT
= 3.0V, L = 6.8µH)
60
Frequency Variation (%)
Supply Current (µA)
1.0
0.0
-1.0
-2.0
-3.0
-4.0
V
OUT
= 1.8V
55
50
45
40
35
30
25
20
3.3
3.8
T
A
= 85°C
T
A
= 25°C
V
OUT
= 2.5V
V
OUT
= 3.3V
T
A
= -40°C
4.3
4.8
5.3
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
6
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1141.2008.10.1.6
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