PRODUCT DATASHEET
AAT1141
SwitchReg
TM
Typical Characteristics
No Load Quiescent Current vs. Input Voltage
(V
OUT
= 1.8V, L = 4.7µH)
0.060
0.060
0.055
0.050
0.045
0.040
0.035
0.030
0.025
0.020
2.7
3.1
3.5
Fast Transient 600mA Step-Down Converter
No Load Quiescent Current vs. Input Voltage
(V
OUT
= 1.2V, L = 2.2µH)
0.055
0.050
0.045
0.040
0.035
0.030
0.025
0.020
2.7
3.1
3.5
3.9
Supply Current (mA)
Supply Current (mA)
T
A
= 85°C
T
A
= 25°C
T
A
= 25°C
T
A
= 85°C
T
A
= -40°C
3.9
4.3
4.7
5.1
5.5
T
A
= -40°C
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
P-Channel R
DS(ON)
vs. Input Voltage
700
600
600
N-Channel R
DS(ON)
vs. Input Voltage
85°C
25°C
-40°C
R
DS(ON)H
(mΩ)
Ω
R
DS(ON)L
(mΩ)
Ω
5.5
500
400
300
200
100
2.7
85°C
25°C
-40°C
550
500
450
400
350
300
250
200
150
100
2.7
3.1
3.5
3.9
4.3
4.7
3.1
3.5
3.9
4.3
4.7
5.1
5.1
5.5
Input Voltage (V)
Input Voltage (V)
Step-Down Converter Load Transient Response
(1mA to 300mA; V
IN
= 3.6V; V
OUT
= 1.8V;
C
OUT
= 4.7µF; C
FF
= 100pF)
V
OUT
(100mV/div)
Step-Down Converter Load Transient Response
(300mA to 400mA; V
IN
= 3.6V;
V
OUT
= 1.8V; C
OUT
= 4.7µF; C
FF
= 100pF)
V
OUT
(50mV/div)
1.8V
1.8V
300mA
I
OUT
(100mA/div)
1mA
I
OUT
(100mA/div)
400mA
300mA
Time (40µs/div)
Time (40µs/div)
1141.2008.10.1.6
www.analogictech.com
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
