AAT1156 Ver la hoja de datos (PDF) - Advanced Analogic Technologies
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AAT1156 Datasheet PDF : 15 Pages
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AAT1156
1MHz 700mA Step-Down DC-DC Converter
Typical Characteristics
Efficiency vs. Load Current
(VOUT = 2.5V; L = 4.7µH)
100
95 VIN = 3.0V
90
85
80
VIN = 4.2V
75
VIN = 3.6V
70
65
60
55
50
1
10
100
1000
Output Current (mA)
Efficiency vs. Load Current
(VOUT = 0.8V; L = 2.2µH)
100
90
80 VIN = 2.7V
70
VIN = 4.2V
60
VIN = 3.6V
50
40
30
20
1
10
100
1000
Output Current (mA)
Output Ripple
(0.8V; 10mA; VIN = 3.6V)
20
1.4
10
1.2
0
1
-10
0.8
-20
0.6
-30
0.4
-40
0.2
-50
0
-60
-0.2
Time (2μs/div)
Soft Start
(0.8V; 700mA; VIN = 3.6V)
2
3.5
1.5
3
1
2.5
0.5
2
0
1.5
-0.5
1
-1
0.5
-1.5
0
-2
-0.5
Time (100μs/div)
Output Ripple
(0.8V; 700mA; VIN = 3.6V)
20
3.5
10
3
0
2.5
-10
2
-20
1.5
-30
1
-40
0.5
-50
0
-60
-0.5
Time (250ns/div)
Line Transient
(IOUT = 500mA; VO = 0.8V)
4.4
60
4.2
50
4
40
3.8
30
3.6
20
3.4
10
3.2
0
3
-10
2.8
-20
Time (20μsec/div)
1156.2007.01.1.4
5
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