AAT2556 Datasheet, PDF (6/27 Pages) Advanced Analogic Technologies – Battery Charger and Step-Down Converter for Portable Applications

DATA SHEET
AAT2556
Battery Charger and Step-Down Converter for Portable Applications
Typical Characteristics – Step-Down Converter
Efficiency vs. Load
(V_OUT = 1.8V; L = 3.3µH)
100
V_IN = 2.7V
90
V_IN = 3.6V
80
V_IN = 5.0V
70
V_IN = 5.5V
60
V_IN = 4.2V
50
40
0.1
1
10
100
1000
Output Current (mA)
DC Load Regulation
(V_OUT = 1.8V; L = 3.3µH)
1.0
0.5
V_IN = 3.6V
0.0
V_IN = 2.7V
-0.5
V_IN = 4.2V
V_IN = 5.5V
V_IN = 5.0V
-1.0
0.1
1
10
100
1000
Output Current (mA)
Efficiency vs. Load
(V_OUT = 1.2V; L = 1.5µH)
100
90
V_IN = 2.7V
80 _{VIN = 3.6V}
70
60
50
40
30
0.1
V_IN = 5.5V
V_IN = 5.0V
V_IN = 4.2V
1
10
100
1000
Output Current (mA)
DC Load Regulation
(V_OUT = 1.2V; L = 1.5µH)
1.0
V_IN = 5.0V
0.5
V_IN = 5.5V
0.0
V_IN = 3.6V
-0.5 V_IN = 4.2V
V_IN = 2.7V
-1.0
0.1
1
10
100
1000
Output Current (mA)
Soft Start
(V_IN = 3.6V; V_OUT = 1.8V;
I_OUT = 250mA; C_FF = 100pF)
5.0
1.6
4.0
V_EN
1.4
3.0
1.2
2.0
1.0
1.0
0.8
0.0
0.6
-1.0
V_O
0.4
-2.0
0.2
-3.0
0.0
-4.0
I_L
-0.2
-5.0
-0.4
Time (100µs/div)
Line Regulation
(V_OUT = 1.8V)
0.6
0.5
0.4
I_OUT = 0mA
0.3
I_OUT = 50mA
0.2
0.1
I_OUT = 150mA
0.0
-0.1
I_OUT = 10mA
-0.2
I_OUT = 250mA
-0.3
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
6
202177B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 19, 2013