LM2735YMYEVAL National Semiconductor, LM2735YMYEVAL Datasheet - Page 13
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LM2735YMYEVAL
Manufacturer Part Number
LM2735YMYEVAL
Description
BOARD EVAL LM2735 520KHZ 8MSOP
Manufacturer
National Semiconductor
Specifications of LM2735YMYEVAL
Main Purpose
DC/DC, Step Up
Outputs And Type
1, Non-Isolated
Voltage - Output
12V
Current - Output
500mA
Voltage - Input
3 ~ 5.5V
Regulator Topology
Boost
Frequency - Switching
520kHz
Board Type
Fully Populated
Utilized Ic / Part
LM2735
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
and V
sible. However, making the traces wide increases radiated
noise, so the designer must make this trade-off. Radiated
noise can be decreased by choosing a shielded inductor. The
remaining components should also be placed as close as
possible to the IC. Please see Application Note AN-1229 for
further considerations and the LM2735 demo board as an ex-
ample of a four-layer layout.
Below is an example of a good thermal & electrical PCB de-
sign. This is very similar to our LM2735 demonstration boards
OUT
traces, so they should be as short and wide as pos-
13
that are obtainable via the National Semiconductor website.
The demonstration board consists of a two layer PCB with a
common input and output voltage application. Most of the
routing is on the top layer, with the bottom layer consisting of
a large ground plane. The placement of the external compo-
nents satisfies the electrical considerations, and the thermal
performance has been improved by adding thermal vias and
a top layer “Dog-Bone”.
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