EN5339QI-E Enpirion, EN5339QI-E Datasheet - Page 13

• 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

Application Information
Setting the Output Voltage
The EN5339 uses a simple and flexible resistor
divider network to program the output voltage.
Table 1 shows the recommended component
values for the feedback network as a function of
VIN, VOUT, and anticipated maximum load current.
It is recommended to use 1% or better feedback
resistors to ensure high accuracy. The value of
resistor Ra is given in the table for the specific
operating conditions
of the bottom resistor Rb is given below as:
Where V
nominally.
AVIN Filter Capacitor
A 1.0
placed between the AVIN and AGND pins. This will
provide high frequency bypass to ensure clean chip
supply for optimal performance.
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Rb
(NOTE: Enable can be separated from PVIN if the
Figure 5. Typical Application Circuit with External
V
F, 10V, 0402 MLCC capacitor should be
Ra
OUT
OUT
is the output voltage and V
V
application requires it)
V
REF
REF
Resistor Divider
.
Based on that value, the value
REF
is 0.6V
Enpirion Confidential
Input Filter Capacitor Selection
A single 22
needed on PVIN for all applications. Connect
between the PVIN and PGND pins. Make sure that
the capacitor is placed as close to the pins of the
EN5339QI as the application allows. Placement of
this part is critical to ensure low conducted and
radiated EMI.
Low ESR MLCC capacitors with X5R or X7R or
equivalent dielectric should be used for the input
capacitors. Y5V or equivalent dielectrics lose too
much capacitance with frequency, DC bias, and
temperature. Therefore, they are not suitable for
switch-mode DC-DC converter filtering, and must
be avoided.
Output Filter Capacitor Selection
Table
capacitor
conditions.
configurations,
Engineering ([e-mail]).
VIN (V)
2.5
5.5
to
Table 1. Typical Recommended Components
(Note: Follow Layout Recommendations)
1
IOUT
3A
provides
configuration
For
F, 0805 X5R MLCC capacitor is
contact
VOUT
2.85V
0.9V
1.2V
1.5V
1.8V
3.3V
2.5
1V
details
the
www.enpirion.com, Page 13
based
3x 22µF
Enpirion
recommended
COUT
(0805)
regarding
on
EN5339QI
Applications
(k )
348
Ra
operating
output
other
(pF)
8.2
Ca
10