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TPS54872

更新时间： 2024-11-17 22:49:39
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德州仪器 - TI 输出元件输入元件
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17页 265K
描述
8-A OUTPUT 4-V TO 6-V INPUT TRACKING /TERMINATION SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FETS

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TPS54872 数据手册

 浏览型号TPS54872的Datasheet PDF文件第2页浏览型号TPS54872的Datasheet PDF文件第3页浏览型号TPS54872的Datasheet PDF文件第4页浏览型号TPS54872的Datasheet PDF文件第5页浏览型号TPS54872的Datasheet PDF文件第6页浏览型号TPS54872的Datasheet PDF文件第7页 
6,4 mm x 9,7 mm  
www.ti.com  
ꢀꢁ ꢂ ꢃꢄ ꢅꢆ ꢇ  
SLVS436C − JULY 2002 − REVISED FEBRUARY 2005  
ꢅ ꢈ ꢉ ꢊꢋ ꢀꢁꢋ ꢀꢌ ꢄ ꢈꢍ ꢀ ꢊ ꢎꢈ ꢍ ꢏ ꢐꢁ ꢋꢀ ꢀꢑ ꢉꢒ ꢓꢏ ꢐꢔ ꢕ ꢀꢖ ꢑꢗ ꢏꢐ ꢉꢀꢏ ꢊ ꢐ  
ꢑ
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FEATURES  
DESCRIPTION  
D
Tracks Externally Applied Reference Voltage  
As a member of the SWIFTfamily of dc/dc regulators,  
the TPS54872 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 3.8 V; an internally set  
slow-start circuit to limit in-rush currents; and a status  
output to indicate valid operating conditions.  
D
30-mΩ MOSFET Switches for High Efficiency  
at 8-A Continuous Output Source or Sink  
Current  
D
D
6% to 90% V Output Tracking Range  
I
Wide PWM Frequency:  
Fixed 350 kHz or Adjustable 280 kHz to  
700 kHz  
D
D
Load Protected by Peak Current Limit and  
Thermal Shutdown  
Integrated Solution Reduces Board Area and  
Total Cost  
APPLICATIONS  
The TPS54872 is available in a thermally enhanced  
28-pin TSSOP (PWP) PowerPADpackage, 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.  
D
DDR Memory Termination Voltage  
D
Active Termination of GTL and SSTL  
High-Speed Logic Families  
D
D
DAC Controlled High Current Output Stage  
Precision Point of Load Power Supply  
SIMPLIFIED SCHEMATIC  
TRANSIENT RESPONSE  
Input  
V
V
= 5 V,  
I
V
(DDQ)  
VIN  
PH  
V
= 1.25 V  
(TTQ)  
O
TPS54872  
BOOT  
PGND  
REFIN  
VBIAS  
COMP  
VSENSE  
AGND  
Compensation  
Network  
2 A to 6 A  
t − Time − 100 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.  
ꢁꢑ ꢊ ꢛꢋ ꢒ ꢀꢏ ꢊꢐ ꢛ ꢉꢀꢉ ꢠꢡ ꢢꢣ ꢤ ꢥꢦ ꢧꢠꢣꢡ ꢠꢝ ꢨꢩ ꢤ ꢤ ꢪꢡꢧ ꢦꢝ ꢣꢢ ꢫꢩꢬ ꢭꢠꢨ ꢦꢧꢠ ꢣꢡ ꢮꢦ ꢧꢪꢯ ꢁꢤ ꢣꢮꢩ ꢨꢧꢝ  
ꢨ ꢣꢡ ꢢꢣꢤ ꢥ ꢧꢣ ꢝ ꢫꢪ ꢨ ꢠ ꢢꢠ ꢨ ꢦ ꢧꢠ ꢣꢡꢝ ꢫ ꢪꢤ ꢧꢰꢪ ꢧꢪ ꢤ ꢥꢝ ꢣꢢ ꢀꢪꢱ ꢦꢝ ꢏꢡꢝ ꢧꢤ ꢩꢥ ꢪꢡꢧ ꢝ ꢝꢧ ꢦꢡꢮ ꢦꢤ ꢮ ꢲ ꢦꢤ ꢤ ꢦ ꢡꢧꢳꢯ  
ꢁꢤ ꢣ ꢮꢩꢨ ꢧ ꢠꢣ ꢡ ꢫꢤ ꢣ ꢨ ꢪ ꢝ ꢝ ꢠꢡ ꢴ ꢮꢣ ꢪ ꢝ ꢡꢣꢧ ꢡꢪ ꢨꢪ ꢝꢝ ꢦꢤ ꢠꢭ ꢳ ꢠꢡꢨ ꢭꢩꢮ ꢪ ꢧꢪ ꢝꢧꢠ ꢡꢴ ꢣꢢ ꢦꢭ ꢭ ꢫꢦ ꢤ ꢦꢥ ꢪꢧꢪ ꢤ ꢝꢯ  
Copyright 2002 − 2005, Texas Instruments Incorporated  
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