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TPS54980 Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza TPS54980
Descripción Electrónicos  3-V TO 4-V INPUT 9-A OUTPUT TRACKING SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETS FOR SEQUENCING
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

TPS54980 Datasheet(HTML) 1 Page - Texas Instruments

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TPS54980
SLVS452A − FEBRUARY 2003 − REVISED FEBRUARY 2005
3V TO 4V INPUT, 9A OUTPUT TRACKING SYNCHRONOUS BUCK
PWM SWITCHER WITH INTEGRATED FETs (SWIFT) FOR SEQUENCING
6,4 mm X 9,7 mm
Typical Size
FEATURES
D Power Up/Down Tracking For Sequencing
D 15-mΩ MOSFET Switches for High Efficiency
at 9-A Continuous Output Source or Sink
Current
D Wide PWM Frequency:
Fixed 350 kHz or Adjustable 280 kHz to
700 kHz
D Power Good and Enable
D Load Protected by Peak Current Limit and
Thermal Shutdown
D Integrated Solution Reduces Board Area and
Component Count
APPLICATIONS
D Low-Voltage, High-Density Distributed Power
Systems
D Point of Load Regulation for High
Performance DSPs, FPGAs, ASICs and
Microprocessors Requiring Sequencing
D Broadband, Networking and Optical
Communications Infrastructure
DESCRIPTION
As a member of the SWIFT
 family of dc/dc regulators,
the TPS54980 low-input voltage high-output current
synchronous buck PWM converter integrates all
required active components. Using the TRACKIN pin
with other regulators, simultaneous power up and down
are easily implemented. Included on the substrate with
the listed features are a true, high performance, voltage
error amplifier that enables maximum performance and
flexibility in choosing the output filter L and C
components;
an
under-voltage-lockout
circuit
to
prevent start-up until the input voltage reaches 3 V; an
internally or externally set slow-start circuit to limit
inrush currents; and a power good output useful for
processor/logic reset.
The TPS54980 is available in a thermally enhanced
28-pin TSSOP (PWP) PowerPAD
 package, which
eliminates bulky heatsinks. TI provides evaluation
modules and the SWIFT
 designer software tool to aid
in quickly achieving high-performance power supply
designs to meet aggressive equipment development
cycles.
SIMPLIFIED SCHEMATIC
VIN
PH
BOOT
PGND
VSENSE
Core Supply
COMP
AGND
VBIAS
Input
TPS54980
TRACKIN
I/O Supply
RL = 1 Ω
VI/O = 3.3 V
V(core) = 1.8 V
t − Time − 1 ms/div
START-UP WAVEFORM
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
PowerPAD and SWIFT are trademarks of Texas Instruments.
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.
www.ti.com
Copyright
 2003 − 2005, Texas Instruments Incorporated


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