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TPS54317 Datasheet(PDF) 1 Page - Texas Instruments

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Part # TPS54317
Description  1.6 MHz, 3-V TO 6-V INPUT, 3-A SYNCHRONOUS STEP-DOWN SWIFT CONVERTER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS54317 Datasheet(HTML) 1 Page - Texas Instruments

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FEATURES
DESCRIPTION
APPLICATIONS
Simplified Schematic
50
55
60
65
70
75
80
85
90
95
100
0
0.5
1
1.5
2
3
2.5
3.5
I - Output
O
Current − A
EFFICIENCY
vs
LOAD CURRENT
VIN
PWRGD
SS/ENA
SYNC
RT
PH
BOOT
PGND
VSENSE
Output
COMP
AGND
VBIAS
Input
TPS54317
T = 25 C,
V = 3.3 V,
V = 1.8 V,
fs = 1.1 MHz
A
I
O
o
TPS54317
SLVS619A – NOVEMBER 2005 – REVISED FEBRUARY 2006
1.6 MHz, 3-V TO 6-V INPUT, 3-A SYNCHRONOUS STEP-DOWN SWIFT™ CONVERTER
60-m
Ω MOSFET Switches for High Efficiency
As members of
the SWIFT™
family
of
dc/dc
at 3-A Continuous Output Current
regulators,
the
TPS54317
low-input-voltage
high-output-current
synchronous-buck
PWM
Adjustable Output Voltage Down to 0.9 V With
converter integrates all required active components.
1% Accuracy
Included on the substrate with the listed features are
Switching Frequency: Adjustable From
a true, high performance, voltage error amplifier that
280 kHz to 1600 kHz
provides high performance under transient conditions;
Externally Compensated for Design Flexibility
an undervoltage-lockout circuit to prevent start-up
until the input voltage reaches 3 V; an internally and
Fast Transient Response
externally
set
slow-start
circuit
to
limit
in-rush
Load Protected by Peak Current Limit and
currents; and a power good output useful for
Thermal Shutdown
processor/logic reset, fault signaling, and supply
Integrated Solution Reduces Board Area and
sequencing.
Total Cost
The TPS54317 device is available in a thermally
Spacing Saving 4mm x 5mm QFN Packaging
enhanced 24-pin QFN (RHF) PowerPAD™ package,
which
eliminates
bulky
heatsinks.
TI
provides
For SWIFT Documentation, Application Notes,
evaluation modules and the SWIFT designer software
and Design Software, see the TI website at
tool to aid in achieving high-performance power
www.ti.com/swift
supply
designs
to
meet
aggressive
equipment
development cycles.
Low-Voltage, High-Density Systems With
Power Distributed at 5 V or 3.3 V
Point of Load Regulation for High
Performance DSPs, FPGAs, ASICs, and
Microprocessors
Broadband, Networking and Optical
Communications Infrastructure
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SWIFT, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005–2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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