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TPS54380 Datasheet

  • TPS54380

  • 3-V TO 6-V INPUT 3-A OUTPUT TRACKING SYNCHRONOUS BUCK PWM SW...

  • 15頁

  • TI

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Typical Size
6,4 mm X 6,6 mm
www.ti.com
TPS54380
SLVS454A 鈭?JANUARY 2003 鈭?REVISED JUNE 2003
3 V TO 6 V INPUT, 3 A OUTPUT TRACKING SYNCHRONOUS BUCK
PWM SWITCHER WITH INTEGRATED FETs (SWIFT錚? FOR SEQUENCING
FEATURES
D
Power-Up/Down Tracking for Sequencing
D
60-m鈩?MOSFET Switches for High Efficiency
D
D
D
D
at 3-A Continuous Output Source or Sink
Current
Wide PWM Frequency:
Fixed 350 kHz or Adjustable 280 kHz to
700 kHz
Power Good and Enable
Load Protected by Peak Current Limit and
Thermal Shutdown
Integrated Solution Reduces Board Area and
Component Count
DESCRIPTION
As a member of the SWIFT錚?family of dc/dc regulators,
the TPS54380 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 TPS54380 is available in a thermally enhanced
20-pin TSSOP (PWP) PowerPAD錚?package, which
eliminates bulky heatsinks. TI provides evaluation
modules and the SWIFT錚?designer software tool to aid
in quickly achieving high-performance power supply
designs to meet aggressive equipment development
cycles.
APPLICATIONS
D
Low-Voltage, High-Density Distributed Power
D
D
Systems
Point of Load Regulation for High
Performance DSPs, FPGAs, ASICs and
Microprocessors Requiring Sequencing
Broadband, Networking and Optical
Communications Infrastructure
SIMPLIFIED SCHEMATIC
I/O Supply
Input
VIN
PH
TPS54380
BOOT
Core Supply
START-UP WAVEFORM
RL = 1鈩?/div>
VI/O = 3.3 V
500 mV/div
TRACKIN PGND
VBIAS VSENSE
AGND COMP
Vcore = 1.8 V
1 ms/div
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.
PowerPAD and SWIFT are trademarks of Texas Instruments.
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.
Copyright
錚?/div>
2003, Texas Instruments Incorporated

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