AAT2689 Datasheet, PDF (5/20 Pages) Advanced Analogic Technologies – PMIC Solution for 12V Adapter Systems with 2-Output High Performance Step-Down Converters

DATA SHEET
AAT2689
Typical Characteristics
PMIC Solution for 12V Adapter Systems
with 2-Output High Performance Step-Down Converters
Step-Down Converter Efficiency vs. Load
(V_OUT1 = 3.3V; L = 4.7µH)
100
90
80
70
60
50
40
30
20
10
0
0.1
1
VIN1 = 6V
V_IN1 = 8V
VIN1 = 12V
V_IN1 = 18V
VIN1 = 24V
10
100
1000
10000
Output Current (mA)
Step-Down Converter DC Regulation
(V_OUT1 = 3.3V; L = 4.7µH)
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
0.1
VIN1 = 6V
V_IN1 = 8V
VIN1 = 12V
V_IN1 = 18V
VIN1 = 24V
1
10
100
1000
Output Current (mA)
10000
Step-Down Converter Line Regulation
(V_OUT1 = 3.3V; L = 4.7µH)
1.00
0.75
0.50
0.25
0.00
-0.25
-0.50
-0.75
-1.00
6
IOUT1 = 0.1mA
IOUT1 = 1mA
I_OUT1 = 1250mA
IOUT1 = 2500mA
8 10 12 14 16 18 20 22 24
Input Voltage (V)
Step-Down Converter Output Ripple
(V_IN1 = 12V; V_OUT1 = 3.3V; I_OUT1 = 1mA)
12V
0V
0.4
0.2
0.0
3.31
3.30
3.29
Time (2µs/div)
Step-Down Converter Output Ripple
(V_IN1 = 12V; V_OUT1 = 3.3V; I_OUT1 = 2.5A)
12V
0V
4.0
3.0
2.0
3.32
3.30
3.28
Time (1µs/div)
Step-Down Converter Load Transient Response
(I_OUT1 = 1.875A to 2.5A; V_IN1 = 12V;
V_OUT1 = 3.3V; C_OUT1 = 2x22µF)
3.0
2.5A
2.5
2.0
1.875A
1.5
3.4
3.3
3.2
Time (100µs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202035A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 8, 2012
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