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TPS63021DSJT Datasheet(PDF) 17 Page - Texas Instruments

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No. de Pieza. TPS63021DSJT
Descripción  HIGH EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 4-A SWITCHES
Descarga  24 Pages
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Fabricante  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS63021DSJT Datasheet(HTML) 17 Page - Texas Instruments

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L1
U1
VIN
GND
VOUT
GND
C1
C2
R1
R2
C3
GND
TPS63020
TPS63021
www.ti.com
SLVS916 – APRIL 2010
LAYOUT CONSIDERATIONS
For all switching power supplies, the layout is an important step in the design, especially at high peak currents
and high switching frequencies. If the layout is not carefully done, the regulator could show stability problems as
well as EMI problems. Therefore, use wide and short traces for the main current path and for the power ground
tracks. The input capacitor, output capacitor, and the inductor should be placed as close as possible to the IC.
Use a common ground node for power ground and a different one for control ground to minimize the effects of
ground noise. Connect these ground nodes at any place close to one of the ground pins of the IC.
The feedback divider should be placed as close as possible to the control ground pin of the IC. To lay out the
control ground, short traces are recommended as well, separation from the power ground traces. This avoids
ground shift problems, which can occur due to superimposition of power ground current and control ground
current.
Figure 22. PCB Layout Suggestion
THERMAL INFORMATION
Implementation of integrated circuits in low-profile and fine-pitch surface-mount packages typically requires
special attention to power dissipation. Many system-dependent issues such as thermal coupling, airflow, added
heat sinks and convection surfaces, and the presence of other heat-generating components affect the
power-dissipation limits of a given component.
Three basic approaches for enhancing thermal performance are listed below:
Improving the power dissipation capability of the PCB design
Improving the thermal coupling of the component to the PCB by soldering the PowerPAD™
Introducing airflow in the system
For more details on how to use the thermal parameters, see the application notes: Thermal Characteristics
Application Note (SZZA017), and IC Package Thermal Metrics Application Note (SPRA953).
Copyright © 2010, Texas Instruments Incorporated
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Product Folder Link(s): TPS63020 TPS63021


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