PRODUCT DATASHEET
AAT1141
SwitchReg
TM
Typical Characteristics
Step-Down Converter Load Transient Response
(1mA to 300mA; V
IN
= 3.6V; V
OUT
= 1.0V;
C
OUT
= 10µF; C
FF
= 0pF)
V
OUT
(100mV/div)
V
OUT
(50mV/div)
Fast Transient 600mA Step-Down Converter
Step-Down Converter Load Transient Response
(300mA to 400mA; V
IN
= 3.6V;
V
OUT
= 1.0V; C
OUT
= 10µF; C
FF
= 0pF)
1.0V
1.0V
300mA
400mA
I
OUT
(100mA/div)
1mA
I
OUT
(100mA/div)
300mA
Time (40µs/div)
Time (40µs/div)
Line Response
(V
OUT
= 1.8V @ 400mA)
1.82
1.81
6.0
5.5
Step-Down Converter Output Ripple
(V
OUT
= 1.8V; V
IN
= 3.6V; I
OUT
= 1mA; L = 4.7µH;
C
FF
= 100pF; C
OUT
= 4.7µF)
Output
Ripple
(20mV/div)
Input Voltage
(bottom) (V)
LX
(2V/div)
1.8V
Output Voltage
(top) (V)
1.80
1.79
1.78
1.77
1.76
5.0
4.5
4.0
3.5
3.0
1.8V
Inductor
Current
(100mA/div)
0mA
Time (25μs/div)
μ
Time (10µs/div)
Step-Down Converter Output Ripple
(V
OUT
= 1.8V; V
IN
= 3.6V; I
OUT
= 600mA;
L = 4.7µH; C
FF
= 100pF; C
OUT
= 4.7µF)
Output
Ripple
(20mV/div)
LX
(2V/div)
1.8V
0V
Inductor
Current
(100mA/div)
600mA
Time (0.5µs/div)
8
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1141.2008.10.1.6
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