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AAT1140 Datasheet, PDF (7/19 Pages) Advanced Analogic Technologies – Fast Transient 600mA Step-Down Converter
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Typical Characteristics
No Load Quiescent Current vs. Input Voltage
(VOUT = 1.8V, L = 4.7µH)
0.060
0.055
TA = 85°C
0.050
0.045
TA = 25°C
0.040
0.035
0.030
0.025
TA = -40°C
0.020
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
P-Channel RDS(ON) vs. Input Voltage
800
700
85°C
600
500
400
300
-40°C
25°C
200
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Load Transient Response
(1mA to 300mA; VIN = 3.6V; VOUT = 1.8V;
C1 = 10μF; CFF = 100pF)
2.0
1.9
VO
1.8
1.7
IO
300mA
1mA
IL
0
Time (50μs/div)
PRODUCT DATASHEET
AAT1140
Fast Transient 600mA Step-Down Converter
No Load Quiescent Current vs. Input Voltage
(VOUT = 1.2V, L = 2.2µH)
0.060
0.055
0.050
0.045
TA = 25°C
TA = 85°C
0.040
0.035
0.030
0.025
TA = -40°C
0.020
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
N-Channel RDS(ON) vs. Input Voltage
700
600
85°C
500
400
300
200
-40°C
25°C
100
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Load Transient Response
(300mA to 400mA; VIN = 3.6V;
VOUT = 1.8V; C1 = 4.7μF)
1.90
1.85 VO
1.80
1.75 IO
400mA
300mA
0.4
0.3
IL
0.2
0.1
Time (50μs/div)
1140.2007.12.1.1
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