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TPS51313DRCT Datasheet(PDF) 10 Page - Texas Instruments

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No. de pieza TPS51313DRCT
Descripción Electrónicos  5-V Input or 3.3-V Input, 3-A, Fully Integrated Converter
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Fabricante Electrónico  TI [Texas Instruments]
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TPS51313DRCT Datasheet(HTML) 10 Page - Texas Instruments

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background image
FB
VCC
VIN
PGND
EN
PGOOD
NC
SW
PGND
SW
CIN
R2
R1
LOUT
EN
PGOOD
COUT
VIN
3.3 or
5 V
UDG-12083
Thermal Pad
TPS51313
VOUT
CFF
TPS51313
SLUSB31 – SEPTEMBER 2012
www.ti.com
REFERENCE DESIGN
Application Schematic
This section describes a simplified design procedure for a discrete graphics processor PEX rail application using
the TPS51313 converter. Figure 9 shows the application schematic..
Figure 9. Reference Design Schematic
Table 1. Reference Design List of Materials
FUNCTION
MANUFACTURER
PART NUMBER
Output Inductor
Vishay
IHLP-1212AB-11
Panasonic
ECJ2FB0J226M
Ceramic Output Capacitors
Murata
GRM21BR60J226ME39L
Design Procedure
Step One. Determine the specifications.
. The PEX rail requirement provides the following key paramaters.
•
VOUT = 1.05 V
•
ICC(max) = 3 A
•
ΔI = 2A (transient load step and release)
•
di/dt = 2.5A/µs
Step Two. Determine the system parameters.
The input voltage range and operating frequency are of primary interest. For example,
•
VIN = VCC = 3.3 V
•
fSW = 1 MHz.
•
Maximum height of power chain components = 1.2 mm
10
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Product Folder Links :TPS51313


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