AAT1138 Datasheet, PDF (5/21 Pages) Skyworks Solutions Inc. – 2A Step-Down Converter with Adjustable Input Current Limit

DATA SHEET
AAT1138
2A Step-Down Converter with Adjustable Input Current Limit
Typical Characteristics
Step-Down Converter Efficiency
(V_OUT = 1.8V; L = 22μH; C_OUT = C_SYSOUT = 22μF)
100
90
80
70
60
50
40
30
20
10
0
0.1
1
VSYSOUT = 2.5V
VSYSOUT = 3.0V
VSYSOUT = 3.6V
VSYSOUT = 4.2V
VSYSOUT = 5.0V
VSYSOUT = 5.5V
10
100
1000
10000
Output Current (mA)
Step-Down Converter Efficiency
(V_OUT = 3.3V; L = 22μH; C_OUT = C_SYSOUT = 22μF)
100
90
80
70
60
50
VSYSOUT = 3.6V
40
VSYSOUT = 3.7V
30
VSYSOUT = 4.2V
20
VSYSOUT = 4.5V
VSYSOUT = 5.0V
10
VSYSOUT = 5.5V
0
0.1
1
10
100
1000
10000
Output Current (mA)
Step-Down Converter Load Regulation
(V_OUT = 1.8V; L = 22μH; C_OUT = C_SYSOUT = 22μF)
1.2
VSYSOUT = 2.5V
0.8
VSYSOUT = 3.0V
VSYSOUT = 3.6V
0.4
VSYSOUT = 4.2V
VSYSOUT = 5.0V
0.0
VSYSOUT = 5.5V
-0.4
-0.8
-1.2
0.1
400
800
1200
1600
2000
Output Current (mA)
Step-Down Converter Load Regulation
(V_OUT = 3.3V; L = 22μH; C_OUT = C_SYSOUT = 22μF)
1.2
VSYSOUT = 3.7V
0.8
VSYSOUT = 4.2V
VSYSOUT = 4.5V
0.4
VSYSOUT = 5.0V
VSYSOUT = 5.5V
0.0
-0.4
-0.8
-1.2
0
400
800
1200
1600
2000
Output Current (mA)
Step-Down Converter Line Regulation
vs. Input Voltage
(VOUT = 1.8V)
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
-0.3
2.5
ILOAD = 1mA
ILOAD = 0.5A
ILOAD = 1A
ILOAD = 1.5A
ILOAD = 2A
3.1
3.7
4.3
4.9
5.5
Input Voltage (V)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
201978B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 15, 2013
5