AAT2148 Datasheet, PDF (5/18 Pages) Skyworks Solutions Inc. – Low-Noise, Fast Transient 1A Step-Down Converter

DATA SHEET
AAT2148
Low-Noise, Fast Transient 1A Step-Down Converter
Typical Characteristics
100
90
80
70
60
50
40
30
20
10
0
0.1
Efficiency vs. Output Current
(V_OUT = 1.2V; L = 2.2μH; C_OUT = 10μF)
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V
VIN = 5.0V
1
10
100
1000
Output Current (mA)
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0.1
Load Regulation
(V_OUT = 1.2V; L = 2.2μH; C_OUT = 10μF)
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V
VIN = 5.0V
1
10
100
1000
Output Current (mA)
100
90
80
70
60
50
40
30
20
10
0
0.1
Efficiency vs. Output Current
(V_OUT = 1.8V; L = 4.7μH; C_OUT = 4.7μF)
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V
VIN = 5.0V
1
10
100
1000
Output Current (mA)
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0.1
Load Regulation
(V_OUT = 1.8V; L = 4.7μH; C_OUT = 4.7μF)
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V
VIN = 5.0V
1
10
100
1000
Output Current (mA)
100
90
80
70
60
50
40
30
20
10
0
0.1
Efficiency vs. Output Current
(V_OUT = 3.3V; L = 6.8μH; C_OUT = 4.7μF)
VIN = 3.6V
VIN = 4.2V
VIN = 5.0V
1
10
100
1000
Output Current (mA)
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0.1
Load Regulation
(V_OUT = 3.3V; L = 6.8μH; C_OUT = 4.7μF)
VIN = 3.6V
VIN = 4.2V
VIN = 5.0V
1
10
100
1000
Output Current (mA)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202009A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 28, 2012
5