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TPS54620_11

更新时间： 2024-11-10 08:38:59
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
44页 2006K
描述
4.5V to 17V Input, 6A Synchronous Step Down SWIFT? Converter

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TPS54620_11 数据手册

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TPS54620  
www.ti.com  
SLVS949C –MAY 2009–REVISED MAY 2011  
4.5V to 17V Input, 6A Synchronous Step Down SWIFT™ Converter  
Check for Samples: TPS54620  
1
FEATURES  
•
•
•
Adjustable Input Undervoltage Lockout  
Supported by SwitcherPro™ Software Tool  
•
•
•
•
•
•
•
•
Integrated 26mΩ / 19mΩ MOSFETs  
For SWIFT™ Documentation and  
SwitcherPro™, visit http://www.ti.com/swift  
Split Power Rail: 1.6V to 17V on PVIN  
200kHz to 1.6MHz Switching Frequency  
Synchronizes to External Clock  
APPLICATIONS  
0.8V ±1% Voltage Reference Over Temperature  
Low 2uA Shutdown Quiescent Current  
Monotonic Start-Up into Pre-biased Outputs  
•
•
•
High Density Distributed Power Systems  
High Performance Point of Load Regulation  
Broadband, Networking and Optical  
Communications Infrastructure  
–40°C to 150°C Operating Junction  
Temperature Range  
•
•
Adjustable Slow Start/Power Sequencing  
Power Good Output Monitor for Undervoltage  
and Overvoltage  
DESCRIPTION  
The TPS54620 in thermally enhanced 3.5mm x 3.5mm QFN package is a full featured 17V, 6A synchronous step  
down converter which is optimized for small designs through high efficiency and integrating the high-side and  
low-side MOSFETs. Further space savings are achieved through current mode control, which reduces  
component count, and by selecting a high switching frequency, reducing the inductor's footprint.  
The output voltage startup ramp is controlled by the SS/TR pin which allows operation as either a stand alone  
power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and  
the open drain power good pins.  
Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced  
by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit  
which turns off the low-side MOSFET to prevent excessive reverse current. Thermal shutdown disables the part  
when die temperature exceeds thermal shutdown temperature.  
WHITE SPACE  
SIMPLIFIED SCHEMATIC  
100  
8 V  
PVIN  
VIN  
VIN  
95  
Cboot  
TPS54620  
BOOT  
90  
85  
Cin  
17 V  
12 V  
VOUT  
Lo  
80  
75  
70  
EN  
PH  
Co  
PWRGD  
R1  
VSENSE  
SS/TR  
65  
60  
R2  
RT/CLK  
COMP  
VOUT = 3.3 V  
Fsw = 480 kHz  
GND  
R3  
C1  
Exposed  
Thermal  
Pad  
55  
50  
Css  
Rrt C2  
0
1
2
3
4
5
6
Load Current - A  
1
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.  
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 © 2009–2011, Texas Instruments Incorporated  
 
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