PRODUCT DATASHEET
AAT1141
SwitchRegTM
FastTransient 600mA Step-Down Converter
Typical Characteristics
No Load Quiescent Current vs. Input Voltage
No Load Quiescent Current vs. Input Voltage
(VOUT = 1.8V, L = 4.7µH)
(VOUT = 1.2V, L = 2.2µH)
0.060
0.060
TA = 85°C
0.055
0.055
TA = 85°C
0.050
0.045
0.040
0.035
0.030
0.025
0.020
0.050
0.045
0.040
0.035
0.030
0.025
0.020
TA = 25°C
TA = 25°C
TA = -40°C
TA = -40°C
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
P-Channel RDS(ON) vs. Input Voltage
N-Channel RDS(ON) vs. Input Voltage
700
600
500
400
300
200
100
600
550
500
450
400
350
300
250
200
150
85°C
85°C
25°C
25°C
-40°C
-40°C
100
2.7
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
Step-Down Converter Load Transient Response
(1mA to 300mA; VIN = 3.6V; VOUT = 1.8V;
COUT = 4.7µF; CFF = 100pF)
Step-Down Converter Load Transient Response
(300mA to 400mA; VIN = 3.6V;
VOUT = 1.8V; COUT = 4.7µF; CFF = 100pF)
VOUT
(100mV/div)
VOUT
(50mV/div)
1.8V
1.8V
300mA
400mA
IOUT
(100mA/div)
IOUT
(100mA/div)
300mA
1mA
Time (40µs/div)
Time (40µs/div)
w w w . a n a l o g i c t e c h . c o m
1141.2008.07.1.4
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ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
