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AAT2556 Datasheet(PDF) 6 Page - Advanced Analog Technology, Inc.

Part No. AAT2556
Description  Battery Charger and Step-Down Converter for Portable Applications
Download  29 Pages
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Maker  AAT [Advanced Analog Technology, Inc.]
Homepage  http://www.aatech.com.tw
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AAT2556 Datasheet(HTML) 6 Page - Advanced Analog Technology, Inc.

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Typical Characteristics – Step-Down Converter
Line Regulation
(VOUT = 1.8V)
Input Voltage (V)
-0.3
-0.2
-0.1
0.0
0.1
0.2
0.3
0.4
0.5
0.6
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
IOUT = 250mA
IOUT = 10mA
IOUT = 0mA
IOUT = 50mA
IOUT = 150mA
Soft Start
(VIN = 3.6V; VOUT = 1.8V;
IOUT = 250mA; CFF = 100pF)
Time (100µs/div)
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
5.0
-0.2
-0.4
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
VEN
VO
IL
DC Load Regulation
(VOUT = 1.2V; L = 1.5µH)
Output Current (mA)
-1.0
-0.5
0.0
0.5
1.0
0.1
1
10
100
1000
VIN = 5.0V
VIN = 5.5V
VIN = 2.7V
VIN = 4.2V
VIN = 3.6V
Efficiency vs. Load
(VOUT = 1.2V; L = 1.5µH)
Output Current (mA)
30
40
50
60
70
80
90
100
0.1
1
10
100
1000
VIN = 3.6V
VIN = 2.7V
VIN = 5.5V
VIN = 4.2V
VIN = 5.0V
DC Load Regulation
(VOUT = 1.8V; L = 3.3µH)
Output Current (mA)
-1.0
-0.5
0.0
0.5
1.0
0.1
1
10
100
1000
VIN = 4.2V
VIN = 3.6V
VIN = 2.7V
VIN = 5.5V
VIN = 5.0V
Efficiency vs. Load
(VOUT = 1.8V; L = 3.3µH)
Output Current (mA)
40
50
60
70
80
90
100
0.1
1
10
100
1000
VIN = 3.6V
VIN = 2.7V
VIN = 4.2V
VIN = 5.0V
VIN = 5.5V
AAT2556
Battery Charger and Step-Down
Converter for Portable Applications
6
2556.2006.09.1.2


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