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TPS54974PWPRG4 Datasheet

  • TPS54974PWPRG4

  • DUAL INPUT BUS (2.5V, 3.3V) 9-A OUTPUT SYNCHRONOUS BUCK PWM ...

  • 503.89KB

  • 18頁

  • TI

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Typical Size
6,4 mm X 9,7 mm
TPS54974
SLVS458B 鈥?JANUARY 2003 鈥?REVISED FEBRUARY 2005
www.ti.com
DUAL INPUT BUS (2.5 V, 3.3 V) 9-A OUTPUT SYNCHRONOUS BUCK
PWM SWITCHER WITH INTEGRATED FETs (SWIFT鈩?
FEATURES
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Low Voltage Separate Power Bus
15-m鈩?MOSFET Switches for High Efficiency
at 9-A Continuous Output
Adjustable Output Voltage
Externally Compensated With 1% Internal
Reference Accuracy
Fast Transient Response
Wide PWM Frequency: 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鈩?family of dc/dc regu-
lators, the TPS54974 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 undervoltage-lockout circuit to pre-
vent start-up until the VIN 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 TPS54974 is available in a thermally enhanced
28-pin TSSOP (PWP) PowerPAD鈩?package, which
eliminates bulky heatsinks.
APPLICATIONS
鈥?/div>
鈥?/div>
Low-Voltage, High-Density Systems
With Power Distributed at 2.5 V,
3.3 V Available
Point-of-Load Regulation for
High-Performance
DSPs, FPGAs, ASICs, and
Microprocessors
Broadband, Networking, and Optical
Communications Infrastructure
Portable Computing/Notebook PCs
鈥?/div>
鈥?/div>
SIMPLIFIED SCHEMATIC
EFFICIENCY
vs
OUTPUT CURRENT
100
SIMPLIFIED SCHEMATIC
2.5 V or 3.3 V
Input1
PVIN
PH
TPS54974
BOOT
PGND
Efficiency - %
Output
95
90
85
80
75
70
65
VIN = 3.3 V,
PVIN = 2.5 V,
V
O
= 1.8 V,
f
s
= 700 kHz
0
1
2
3
4
5
6
7
8
9
10
Input2
3.3 V
VIN
VBIAS
COMP
AGND VSENSE
Compensation
Network
60
55
50
I
O
- Output Current - 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.
SWIFT, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 漏 2003鈥?005, Texas Instruments Incorporated

TPS54974PWPRG4 產(chǎn)品屬性

  • Understanding SWIFT Step Down Dc/Dc Converters

  • 2,000

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器

  • SWIFT™

  • 降壓（降壓）

  • 可調(diào)式

  • 1

  • 0.9 V ~ 2 V

  • 3 V ~ 4 V

  • -

  • 350kHz

  • 9A

  • 是

  • -40°C ~ 85°C

  • 表面貼裝

  • 28-SOIC（0.173"，4.40mm 寬）裸露焊盤

  • 帶卷 (TR)

  • 28-HTSSOP

  • 296-17304-ND - EVAL MODULE FOR XILINX FPGA

TPS54974PWPRG4相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
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    廠商
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