AAT2687 Datasheet, PDF (5/20 Pages) Advanced Analogic Technologies – PMIC Solution for 24V Systems with 2 High Performance Step-Down Converters

DATA SHEET
AAT2687
PMIC Solution for 24V Systems
with 2 High Performance Step-Down Converters
Typical Characteristics—Channel 1
Step-Down Converter Efficiency vs. Load Current
100
90
80
70
60
50
40
30
20
10
0
0.001
0.01
0.1
VIN1 = 6V
V_IN1 = 7V
VIN1 = 8V
VIN1 = 12V
VIN1 = 18V
VIN1 = 24V
1
10
Load Current (A)
Step-Down Converter Load Regulation
vs. Load Current
2
1.5
1
0.5
0
VIN1 = 6V
-0.5
V_IN1 = 7V
-1
V_IN1 = 8V
VIN1 = 12V
-1.5
VIN1 = 18V
-2
VIN1 = 24V
0.001
0.01
0.1
1
10
Load Current (A)
Step-Down Converter Line Regulation
vs. Load Current
2
IOUT1 = 0.1µA
1.5
IOUT1 = 2.25A
1
I_OUT1 = 3.5A
IOUT1 = 4mA
0.5
IOUT1 = 4.5A
0
-0.5
-1
-1.5
-2
6
9
12
15
18
21
24
Input Voltage (V)
No Load Step-Down Converter Input Current
vs. Input Voltage
650
625
600
575
550
525
500
475
450
6
85°C
25°C
-40°C
9
12
15
18
21
24
Input Voltage (V)
Step-Down Converter Switching Frequency
vs. Input Voltage
(VOUT1 = 3.3V; IOUT1 = 4.5A)
8
85°C
6
25°C
4
-40°C
2
0
-2
-4
-6
-8
6
8
10 12 14 16 18 20 22 24
Input Voltage (V)
Step-Down Converter Output Voltage
vs. Temperature
(VOUT = 3.3V; IOUT1 = 4.5A; COUT1 = 66µF; L = 4.7µH; VIN1 = 12V)
1
0.75
0.5
0.25
0
-0.25
-0.5
-0.75
-1
-40
-15
10
35
60
85
Temperature (°C)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202033A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 8, 2012
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