PRODUCT DATASHEET
AAT1141
SwitchRegTM
FastTransient 600mA Step-Down Converter
Typical Characteristics
Soft Start
Line Regulation
(VIN = 3.6V; VOUT = 1.8V; Load = 3Ω; CFF = 100pF)
(VOUT = 1.8V)
0.5
0.4
0.3
IOUT = 10mA
IOUT = 600mA
EN
(2V/div)
0.2
0.1
0V
VOUT
0.0
(2V/div)
-0.1
-0.2
-0.3
-0.4
-0.5
0V
IIN
(200mA/div)
0mA
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
Time (100μs/div)
Switching Frequency vs. Temperature
Output Voltage Error vs. Temperature
(VIN = 3.6V; VOUT = 1.8V)
(VIN = 3.6V; VO = 1.8V; IOUT = 400mA)
10.00
8.00
2.0
1.0
6.00
4.00
2.00
0.00
0.0
-2.00
-4.00
-6.00
-8.00
-10.00
-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
(VOUT = 3.0V, L = 6.8µH)
2.0
1.0
60
55
TA = 85°C
VOUT = 1.8V
50
TA = 25°C
0.0
45
40
35
30
-1.0
-2.0
-3.0
-4.0
VOUT = 2.5V
VOUT = 3.3V
TA = -40°C
25
20
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
3.3
3.8
4.3
4.8
5.3
Input Voltage (V)
Input Voltage (V)
w w w . a n a l o g i c t e c h . c o m
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1141.2008.07.1.4
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
