EN5339QI-E Enpirion, EN5339QI-E Datasheet - Page 14

• Manufacturer Part Number: EN5339QI-E
• Description: Power Management IC Development Tools EN5339QI EVAL BOARD
• Manufacturer: Enpirion
• Type: DC/DC Converters, Regulators & Controllersr

Specifications of EN5339QI-E

• Product Category: Power Management IC Development Tools
• Product: Evaluation Boards
• Tool Is For Evaluation Of: EN5339QI
• Input Voltage: 2.4 V to 5.5 V
• Output Voltage: 0.6 V
• Output Current: 3 A

Layout Recommendations
Layout Recommendations
Recommendation 1: Input and output filter
capacitors should be placed on the same side of
capacitors should be placed on the same side of
the PCB, and as close to the EN5339
as possible. They should be connected to the
as possible. They should be connected to the
device with very short and wide traces. Do not use
device with very short and wide traces. Do not use
thermal reliefs or spokes when connecting
thermal reliefs or spokes when connecting the
capacitor pads to the respective nodes. The +V and
capacitor pads to the respective nodes. The +V and
GND traces between the capacitors and the
GND traces between the capacitors and the
EN5339QI should be as close to each other as
possible so that the gap between the two nodes is
possible so that the gap between the two nodes is
minimized, even under the capacitors.
Recommendation 2: The system ground plane
should be the first layer immediately below the
should be the first layer immediately below the
surface layer. This ground plane should be
surface layer. This ground plane should be
continuous and un-interrupted below the converter
and the input/output capacitors.
Recommendation 3 : The thermal pad underneath
the component must be connected to the system
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Figure 6. Optimized Layout Recommendations
QI should be as close to each other as
Optimized Layout Recommendations
st be connected to the system
interrupted below the converter
: The thermal pad underneath
Input and output filter
system ground plane
5339QI package
Enpirion Confidential
ground plane through as many vias as possible.
The drill diameter of the vias should be 0.33mm,
and the vias must have at least 1 oz. copper plating
on the inside wall, making the finished hole size
spokes to connect the vias to the ground plane.
This connection provides the path for heat
dissipation from the converter.
size
ground terminal of the input capacitor and output
capacitors to the system ground plane. It is
preferred to put these vias along the edge of the
GND copper closest to the +V copper. These vias
connect the input/output filter capacitors to the
GND plane, and help reduce parasitic inductances
in the input and output current loops.
connected to the input voltage at a quiet point. In
device must not be more than shown in Figure 6.
See the section regarding exposed metal on bottom
converter, try not to run sensitive signal or control
lines underneath the converter package on other
be just after the last output filter capacitor. Keep the
impedance, sensitive node. Keep the trace to this
pin as short as possible. Whenever possible,
going through the GND plane.
and layout reviews for all customer designs. Please
([e-mail]).
ground plane through as many vias as possible.
The drill diameter of the vias should be 0.33mm,
and the vias must have at least 1 oz. copper plating
on the inside wall, making the finished hole size
around 0.20-0.26mm. Do not
spokes to connect the vias to the ground plane.
This connection provides the path for heat
dissipation from the converter.
Recommendation 4 : Multiple small vias (the same
size
recommendation 3) should be used to connect
ground terminal of the input capacitor and output
capacitors to the system ground plane. It is
preferred to put these vias along the edge of the
GND copper closest to the +V copper. These vias
connect the input/output filter capac
GND plane, and help reduce parasitic inductances
in the input and output current loops.
Recommendation 5 : AVIN is the power supply for
the small-signal control circuits. It should be
connected to the input voltage at a quiet point. In
Figure 6 this connection is made at the input
capacitor. Connect a 1µF capacitor from the AVIN
pin to AGND.
Recommendation 6 : The layer 1 metal under the
device must not be more than shown in
See the section regarding exposed metal on bottom
of package. As with any switch
converter, try not to run sensitive signal or control
lines underneath the converter package on other
layers.
Recommendation 7: The V
be just after the last output filter capacitor. Keep the
sense trace short in order to avoid noise coupling
into the node.
Recommendation 8 : Keep R
the VFB pin (See Figures 6). The VFB pin is a high
impedance, sensitive node. Keep the trace to this
pin as short as possible. Whenever possible,
connect R
going through the GND plane.
Recommendation 13 : Enpirion provides schematic
and layout reviews for all customer designs.
contact local sales representatives
Enpirion
([e-mail])
as
as
ace short in order to avoid noise coupling
this connection is made at the input
Connect a 1µF capacitor from the AVIN
B
e. As with any switch-mode DC/DC
signal control circuits. It should be
Applications
the
the
0.26mm. Do not use thermal reliefs or
directly to the AGND pin instead of
directly to the AGND pin instead of
thermal
thermal
representatives for references to
: Keep R
: Multiple small vias (the same
: AVIN is the power supply for
: The layer 1 metal under the
should be used to connect
: Enpirion provides schematic
The V
www.enpirion.com
www.enpirion.com, Page 14
). The VFB pin is a high-
Engineering
OUT
vias
vias
A
, C
sense point should
A
, and R
discussed
discussed
EN5339QI
B
, close to
support
in
in