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TPS54910 Datasheet

  • TPS54910

  • 具有可調(diào)節(jié)輸出電壓的 3.3V 輸入 9A 同步降壓轉(zhuǎn)換器

  • 19頁

  • TI

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Typical Size
6,4 mm X 9,7 mm
www.ti.com
TPS54910
SLVS421B 鈥?MARCH 2002 鈥?REVISED AUGUST 2002
3-V TO 4-V INPUT, 9-A OUTPUT SYNCHRONOUS BUCK PWM
SWITCHER WITH INTEGRATED FETs (SWIFT錚?
FEATURES
D
15-m鈩?MOSFET Switches for High Efficiency
D
D
D
D
D
D
at 9-A Continuous Output
0.9-V to 2.5-V Adjustable Output Voltage
Externally Compensated With 1% Accuracy
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 a member of the SWIFT錚?family of dc/dc regulators,
the TPS54910 low-input voltage high-output current
synchronous buck PWM converter integrates all
required active components. Included on the substrate
with the listed features are a true, high performance,
voltage error amplifier that enables maximum
performance under transient conditions 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 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 TPS54910 is available in a thermally enhanced
28-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 Systems With
D
D
D
Power Distributed at 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
SIMPLIFIED SCHEMATIC
Input
VIN
PH
TPS54910
BOOT
PGND
VBIAS
COMP
Output
EFFICIENCY AT 700 kHz
100
95
90
Efficiency 鈥?%
85
80
75
70
65
60
VI = 3.3 V,
VO = 2.5 V
0
1
2
3
4
5
6
7
8
9
10 11 12
AGND VSENSE
Compensation
Network
55
50
IO 鈥?Output 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
錚?/div>
2002, Texas Instruments Incorporated

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