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STW41412/T Datasheet(PDF) 22 Page - STMicroelectronics

Part # STW41412/T
Description  Single Coil Dual Output Step Down DC/DC Converter for Digital Base Band and Multimedia Processor Supply
PDF  27 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STW41412/T Datasheet(HTML) 22 Page - STMicroelectronics

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4 Application information
STw4141
22/27
Figure 15. Board layout track length and width
4.7.1
PCB layout
Figure 16 and Figure 17 show the PCB layout. All components are on the top side of the board.
Figure 16. Demoboard top layer
Figure 17. Demoboard assembled with 2x10µF
output capacitors
VOUT1
FB1
V
OUT1=1.8V
C
OUT1
22 µF
6.3 V
VOUT2
FB2
V
OUT2=1.0V/1.2V
C
OUT2
22 µF
6.3 V
PVDD
V
IN=2.7V to 5.5V
C
IN
10 µF
6.3 V
PGND
VDD
EN
VLX1
VLX2
GND
MODE/SYNC
T_MODE
AUTO
L 4.7 µH
STw4141
VSEL
STATE
B1
D3
D4
C2
C3
C1
A4
D1
B4
D2
B2
A2
A3
A1
B3
C4
HIGH CURRENT PATH
VOUT1
FB1
V
OUT1=1.8V
C
OUT1
22 µF
6.3 V
VOUT2
FB2
V
OUT2=1.0V/1.2V
C
OUT2
22 µF
6.3 V
PVDD
V
IN=2.7V to 5.5V
C
IN
10 µF
6.3 V
PGND
VDD
EN
VLX1
VLX2
GND
MODE/SYNC
T_MODE
AUTO
L 4.7 µH
STw4141
VSEL
STATE
B1
D3
D4
C2
C3
C1
A4
D1
B4
D2
B2
A2
A3
A1
B3
C4
HIGH CURRENT PATH



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