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PDF AAT4674 Data sheet ( Hoja de datos )
| Número de pieza | AAT4674 | |
| Descripción | Power Supply Selector Switch | |
| Fabricantes | Skyworks | |
| Logotipo |  |
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General Description
The AAT4674-1 is a member of Skyworks' Application
Specific Power Management SmartSwitch™ family. This
device is a dual input single output power supply selector
switche designed to operate from batteries, or any other
power supply with an input voltage up to 6V.
The AAT4674-1 connects the supply voltage on IN1 to
OUT, or IN2 to OUT, through a very low RDS(ON) power
MOSFET that minimizes voltage drops and power dissi-
pation. The enable (EN) and select (SEL) pin voltages
control the operational state of the internal power
MOSFET switches. Once enabled, the SEL pin will switch
between the IN1 and IN2 inputs. If both input voltages
are below the UVLO, then the AAT467-1 output floats. If
one of the input voltages is above the UVLO threshold
then that input voltage that is above the UVLO threshold
is passed through to the output.
The two power switches are current limited and the cur-
rent limit thresholds can be programmed through the
resistors on IIN1 and IIN2 pins respectively.
The AAT4674-1 is available in the thermally enhanced,
space-saving Pb-free 12-pin TSOPJW package. The 4674-
1 is specified for operation over the -40°C to +85°C
temperature range.
DATA SHEET
AAT4674
Power Supply Selector Switch
Features
• Input Voltage Supply Range: 2.5V to 6V
• High Level of Integration:
▪ Reverse Blocking Diode
▪ Current Sensing
▪ Programmable Current Limit
▪ Single Control Pin Switching
• Break-Before-Make Switch-Over
▪ Minimum Output Voltage Drop During Change-Over
• Shutdown Current < 1μA
• Thermal Protection
• TSOPJW-12 Package
Applications
• Bluetooth™ Headsets
• Cell Phones
• Digital Still Cameras
• MP3 Players
• Personal Data Assistants (PDAs)
• Set Top Boxes
Typical Application
+5V
+3.3V
IN1/IN2 Select
Enable
IN1
IN2
SEL
EN
OUT
IIN1
IIN2
GND
System Load
RIIN2
RIIN1
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201911A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 26, 2012
1
1 page  
Typical Characteristics
IIN1 Shutdown Current vs. Temperature
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-40
VIN1 = 6.5V
VIN1 = 5V
VIN1 = 3.6V
VIN1 = 4.2V
-15 10 35 60 85
Temperature (°C)
IIN1 Operation Current vs. Temperature
(IOUT = 0A)
20
18
16
14
12
10
8
6
4
-40
VIN1 = 5V
VIN1 = 6.5V
VIN1 = 3.6V
VIN1 = 4.2V
-15 10 35 60 85
Temperature (°C)
RDS(ON) vs. Temperature
250
200
VIN = 2.5V
150
VIN = 3.5V
100
50
0
-40
VIN = 5V
VIN = 6.5V
-15 10 35 60
Temperature (°C)
85
110
DATA SHEET
AAT4674
Power Supply Selector Switch
IIN2 Shutdown Current vs. Temperature
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-40
VIN2 = 6.5V
VIN2 = 5V
VIN2 = 3.6V
VIN2 = 4.2V
-15 10 35 60 85
Temperature (°C)
IIN2 Operation Current vs. Temperature
(IOUT = 0A)
20
18 VIN2 = 6.5V
16
14 VIN2 = 5V
12
10 VIN2 = 4.2V
8 VIN2 = 3.6V
6
4
-40 -15 10 35 60 85
Temperature (°C)
Enable Threshold vs. Input Voltage
1.1
1.05
1
0.95
VIH(EN)
0.9
0.85
0.8
VIL(EN)
0.75
0.7
0.65
0.6
2.5
3
3.5 4
4.5 5
5.5 6
6.5
Input Voltage (V)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201911A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 26, 2012
5
5 Page 
Evaluation Board Schematic
C1 MAIN
2.2μF
AUX
C2
2.2μF
J1
2
1
Header 2
EN
R1
100K
U1
1 IN1
2 IN1
3 IN2
4 IN2
5 EN
6 GND
AAT4674-1
GND
OUT
OUT
IIN1
IIN2
SEL
GND
12
11
10
9
8
7
PWRSEL
DATA SHEET
AAT4674
Power Supply Selector Switch
OUT
IMAIN
IAUX
C3
2.2μF
R3
49.9K R2
49.9K
Figure 1: AAT4674-1 Evaluation Board Schematic.
Evaluation Board Layout
Figure 2: AAT4674-1 Evaluation
Board Top Side Layout.
Figure 3: AAT4674-1 Evaluation
Board Bottom Side Layout.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201911A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 26, 2012
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AAT4674.PDF ] | |
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