SC120 Datasheet, PDF (19/21 Pages) Semtech Corporation – Low Voltage Synchronous Boost Converter

SC120
Applications Information (continued)
PCB Layout Considerations
• Route the output voltage feedback path away
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.
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
A few simple design rules can be implemented to ensure
good layout:
dissipation. Separation between the LX node
and GND should be maintained to avoid cou-
pling capacitance between the LX node and the
• Place the inductor and filter capacitors as close
ground plane.
• Use a ground plane with several vias connecting
to the device as possible and use short wide
to the component side ground to further reduce
traces between the power components.
noise interference on sensitive circuit nodes.
IAL 6.7mm
ENT_COUT
V_OUT
CONFID ^LX
LX
OUT
GND SC120 FB
IN
EN
R₁
(2^nd layer)
R₂
5.2mm
V_IN
C_IN
PRELIMINARY
19