AAT1149B Datasheet, PDF (5/17 Pages) Advanced Analogic Technologies – 2.2MHz Fast Transient 400mA Step-Down Converter

DATA SHEET
AAT1149B
2.2MHz Fast Transient 400mA Step-Down Converter
Typical Characteristics
100
90
80
70
60
50
40
30
20
10
0
0.1
Efficiency vs. Output Current
(V_OUT = 1.8V; L = 1.5µH)
VIN = 5.5V
VIN = 5V
VIN = 4.2V
VIN = 3.6V
VIN = 3V
V_IN = 2.7V
V_IN = 2.3V
1
10
100
1000
Output Current (mA)
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
0.1
Load Regulation
(V_OUT = 1.8V; L = 1.5µH)
VIN = 5.5V
VIN = 5V
VIN = 4.2V
VIN = 3.6V
VIN = 3V
VIN = 2.7V
VIN = 2.3V
1
10
100
1000
10000
Output Current (A)
No Load Quiescent Current vs. Input Voltage
5
4.5
4
3.5
3
2.5
2
T = 85°C
1.5
T = 25°C
T = -40°C
1
2.5
3
3.5
4
4.5
5
5.5
6
Input Voltage (V)
Frequency Variation vs. Input Voltage
(V_OUT = 1.8V)
2
1
0
-1
-2
-3
-4
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Switching Frequency Variation vs. Temperature
10
8
6
4
2
0
-2
-4
-6
-8
-10
-40 -20
0
20
40
60
80
Temperature (°C)
100 120
Output Voltage Error vs. Temperature
(V_IN = 3.6V; V_O = 1.8V; I_OUT = 400mA)
2.0
1.0
0.0
-1.0
-2.0
-40
-20
0
20
40
60
Temperature (°C)
80
100
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
201989B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013
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