SC120 SEMTECH [Semtech Corporation], SC120 Datasheet - Page 19

• Manufacturer Part Number: SC120
• Description: Low Voltage Synchronous Boost Converter
• Manufacturer: SEMTECH [Semtech Corporation]

Applications Information (continued)
PCB Layout Considerations
Poor layout can degrade the performance of the DC-DC
converter and can contribute to EMI problems, ground
bounce, and resistive voltage losses. Poor regulation and
instability can result.
A few simple design rules can be implemented to ensure
good layout:
•
Place the inductor and fi lter capacitors as close
to the device as possible and use short wide
traces between the power components.
V
IN
L
X
6.7mm
PRELIMINARY
GND
LX
IN
SC120
C
•
•
•
IN
C
Route the output voltage feedback path away
from the inductor and LX node to minimize
noise and magnetic interference.
Maximize ground metal on the component side
to improve the return connection and thermal
dissipation. Separation between the LX node
and GND should be maintained to avoid cou-
pling capacitance between the LX node and the
ground plane.
Use a ground plane with several vias connecting
to the component side ground to further reduce
noise interference on sensitive circuit nodes.
OUT
OUT
FB
EN
R
R
1
2
(2
V
nd
layer)
OUT
5.2mm
SC120
19