STW41412/T ST-Ericsson Inc, STW41412/T Datasheet - Page 25

• Manufacturer Part Number: STW41412/T
• Description: IC CONV DC/DC STPDN 16-TFBGA
• Manufacturer: ST-Ericsson Inc
• Type: Step-Down (Buck)r

Specifications of STW41412/T

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 1.3V, 1.8V
• Current - Output: 200mA, 400mA
• Frequency - Switching: 900kHz
• Voltage - Input: 2.7 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

Application information
4.7.1
4.7.2
24/30
Figure 16. Demoboard top layer
PCB layout
Figure 16
board.
TFBGA16 internal bumps access
Pad centers are at 500 µm distance. Pad diameter is 275 µm. The distance between two
adjacent pad edges is only 225 µm. We recommend a distance for lead-out signals from the
center of pad matrix by 75 µm wide trace. Isolation distance in this case is 75 µm (see
Figure 18
Figure 18. TFBGA16 ball pad spacing and track parameters to internal pads
and
and
Figure 17
Figure 19
Grid dot distance :
).
show the PCB layout. All components are on the top side of the
Figure 17. Demoboard assembled with 22 µF
output capacitor
with
A = 500µm
B = 275µm
C = 75µm
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