AAT1140 Datasheet, PDF (8/19 Pages) Advanced Analogic Technologies – Fast Transient 600mA Step-Down Converter

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Typical Characteristics
Load Transient Response
(300mA to 400mA; V_IN = 3.6V;
V_OUT = 1.8V; C₁ = 10μF)
1.90
1.85 _VO
1.80
1.75 _IO
400mA
300mA
0.4
I_L
0.3
0.2
0.1
Time (50μs/div)
Line Response
(V_OUT = 1.8V @ 400mA)
1.82
6.0
1.81
5.5
1.80
5.0
1.79
4.5
1.78
4.0
1.77
3.5
1.76
3.0
Time (25μs/div)
Output Ripple
(V_IN = 3.6V; V_OUT = 1.8V; Load = 3Ω)
0.08
1.40
0.07
1.20
0.06
1.00
0.05
0.80
0.04
0.60
0.03
0.02
0.40
0.01
0.20
0.00
0.00
Time (40ns/div)
PRODUCT DATASHEET
AAT1140
Fast Transient 600mA Step-Down Converter
Load Transient Response
(300mA to 400mA; V_IN = 3.6V; V_OUT = 1.8V;
C₁ = 10µF; C_FF = 100pF)
1.850
1.825 _VO
1.800
1.775 _IO
400mA
300mA
0.4
I_L
0.3
0.2
0.1
Time (50µs/div)
Output Ripple
(V_IN = 3.6V; V_OUT = 1.8V; I_OUT = 1mA)
40
20 _VO
0
-20
-40
-60 _IL
-80
-100
-120
Time (10µs/div)
0.30
0.25
0.20
0.15
0.10
0.05
0.00
-0.05
-0.10
8
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1140.2007.12.1.1