PRODUCT DATASHEET
AAT1146
SwitchReg
TM
Typical Characteristics
Line Response
(V
OUT
= 1.8V @ 400mA)
Output Voltage (AC coupled)
(top) (mV)
1.82
1.81
6.0
5.5
40
20
0
-20
-40
-60
-80
-100
-120
Fast Transient 400mA Step-Down Converter
Output Ripple
(V
IN
= 3.6V; V
OUT
= 1.8V; I
OUT
= 1mA)
0.30
V
O
0.25
Inductor Current
(bottom) (A)
Output Voltage
(top) (V)
0.20
0.15
0.10
Input Voltage
(bottom) (V)
1.80
1.79
1.78
1.77
1.76
5.0
4.5
4.0
3.5
3.0
I
L
0.05
0.00
-0.05
-0.10
Time (25μs/div)
μ
Time (10µs/div)
Output Ripple
(V
IN
= 3.6V; V
OUT
= 1.8V; I
OUT
= 400mA)
Output Voltage (AC coupled)
(top) (mV)
40
20
0
-20
-40
-60
-80
-100
-120
0.9
V
O
0.8
Inductor Current
(bottom) (A)
0.7
0.6
0.5
0.4
0.3
I
L
0.2
0.1
Time (500ns/div)
8
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1146.2008.06.1.6
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