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TPS54316 Datasheet

  • TPS54316

  • 具有 3.3V 输出的低输入电压 3A 同步降压转换器

  • 349.31KB

  • 17页

  • TI

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Typical Size
(6,3 mm x 6,4 mm)
www.ti.com
TPS54311, TPS54312
TPS54313, TPS54314
TPS54315, TPS54316
SLVS416A 鈥?FEBRUARY 2002 鈥?JULY 2003
3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS-BUCK PWM
SWITCHER WITH INTEGRATED FETs (SWIFT铮?
FEATURES
D
60-m鈩?MOSFET Switches for High Efficiency
D
D
D
D
D
D
at 3-A Continuous Output Source or Sink
Current
0.9-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V and 3.3-V Fixed
Output Voltage Devices With 1% Initial
Accuracy
Internally Compensated for Low Parts Count
Fast Transient Response
Wide PWM Frequency: Fixed 350 kHz, 550
kHz, or Adjustable 280 kHz to 700 kHz
Load Protected by Peak Current Limit and
Thermal Shutdown
Integrated Solution Reduces Board Area and
Total Cost
DESCRIPTION
As members of the SWIFT family of dc/dc regulators, the
TPS54311,
TPS54312,
TPS54313,
TPS54314,
TPS54315 and TPS54316 low-input-voltage high-output-
current synchronous-buck PWM converters integrate all
required active components. Included on the substrate
with the listed features are a true, high performance,
voltage error amplifier that provides high performance
under transient conditions; an undervoltage-lockout circuit
to prevent start-up until the input voltage reaches 3 V; an
internally and externally set slow-start circuit to limit
in-rush currents; and a power good output useful for
processor/logic reset, fault signaling, and supply
sequencing.
The TPS54311, TPS54312, TPS54313, TPS54314,
TPS54315 and TPS54316 devices are available in a
thermally enhanced 20-pin TSSOP (PWP) PowerPAD铮?/div>
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.
APPLICATIONS
D
Low-Voltage, High-Density Systems With
D
D
D
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
Portable Computing/Notebook PCs
Simplified Schematic
Input
VIN
PH
BOOT
PGND
VBIAS
VSENSE
GND
Output
EFFICIENCY
vs
LOAD CURRENT
96
94
92
Efficiency 鈥?%
90
88
86
84
82
80
0
TA = 25掳C
VI = 5 V
VO = 3.3 V
0.5
1
1.5
2
2.5
3
TPS54316
Load Current 鈥?A
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
铮?/div>
2002 鈥?2003, Texas Instruments Incorporated

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