LTM4641
APPLICATIONS INFORMATION—SAFETY AND LAYOUT GUIDANCE
•ꢀ Placeꢀallꢀfeedbackꢀcomponentsꢀasꢀcloseꢀtoꢀtheꢀmoduleꢀ
an example of routing the VOUT/GND remote-sense
pin pair in Layer 3 of DC1543.
as possible, giving layout priority first to capacitors
C
, C , C
, C
and C (if used)—followed
FFA FFB CMA CMB DM
•ꢀ Toꢀfacilitateꢀstuffingꢀverification,ꢀandꢀtestꢀandꢀdebugꢀac-
tivities,considerroutingcontrolsignalsoftheLTM4641
with short traces to localized test points, test pads or
test vias—as PCB layout space permits. Both in-house
and contract manufacturers enjoy gaining electrical
access to all non low impedance (≥10Ω) pins of an IC
or μModule regulator to improve in-circuit test (ICT)
coverage.
nextbyR
, R
andR
(ifused). SeeFigure5
SET2
SET1A SET1B
in the Applications Information section and Figure 64
in Appendix D for more details. Maintain differential
routing of the remote-sense lines between the load
and the module. Form a “coaxial cable” structure that
surrounds the remote-sense lines with GND potential
within the PCB, to the extent that layout permits. See
Figure 43. Recoꢃꢃended PCB Layout, Figure 45 Circuit. View of the LTꢁ4641 froꢃ Top of Package
Figure 44. Recoꢃꢃended PCB Layout, Figure 46 Circuit. View of the LTꢁ4641 froꢃ Top of Package
4641f
47
Linear [ Linear ]
