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TPS54218

更新时间： 2024-09-18 07:04:47
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
34页 1443K
描述
2.95 V to 6 V Input 2 A Output 2MHz Synchronous Step Down Switcher With Integrated FETs (SWIFT)

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TPS54218 数据手册

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TPS54218  
www.ti.com ......................................................................................................................................................................................... SLVS974 –SEPTEMBER 2009  
2.95 V to 6 V Input, 2 A Output, 2MHz, Synchronous Step Down  
Switcher With Integrated FETs ( SWIFT™)  
Check for Samples :TPS54218  
1
FEATURES  
DESCRIPTION  
2
•
Two 30 mΩ (typical) MOSFETs for High  
The TPS54218 device is a full featured 6 V, 2 A,  
synchronous step down current mode converter with  
two integrated MOSFETs.  
Efficiency at 2 A loads  
•
•
200kHz to 2MHz Switching Frequency  
0.8 V ± 1% Voltage Reference Over  
Temperature  
The TPS54218 enables small designs by integrating  
the MOSFETs, implementing current mode control to  
reduce external component count, reducing inductor  
size by enabling up to 2 MHz switching frequency,  
and minimizing the IC footprint with a small 3mm x  
3mm thermally enhanced QFN package.  
•
•
•
•
Synchronizes to External Clock  
Adjustable Slow Start/Sequencing  
UV and OV Power Good Output  
Low Operating and Shutdown Quiescent  
Current  
The TPS54218 provides accurate regulation for a  
variety of loads with an accurate ±1% Voltage  
Reference (Vref) over temperature.  
•
•
Safe Start-up into Pre-Biased Output  
Cycle by Cycle Current Limit, Thermal and  
Frequency Fold Back Protection  
Efficiency is maximized through the integrated 30mΩ  
MOSFETs and 350μA typical supply current. Using  
the enable pin, shutdown supply current is reduced to  
2 μA by entering a shutdown mode.  
•
•
–40°C to 150°C Operating Junction  
Temperature Range  
Undervoltage lockout is internally set at 2.6 V, but  
can be increased by programming the threshold with  
a resistor network on the enable pin. The output  
voltage startup ramp is controlled by the slow start  
pin. An open drain power good signal indicates the  
output is within 93% to 107% of its nominal voltage.  
Thermally Enhanced 3mm × 3mm 16-pin QFN  
APPLICATIONS  
•
•
Low-Voltage, High-Density Power Systems  
Point of Load Regulation for High Performance  
DSPs, FPGAs, ASICs and Microprocessors  
Broadband, Networking and Optical  
Communications Infrastructure  
Frequency fold back and thermal shutdown protects  
the device during an overcurrent condition.  
The TPS54218 is supported in the SwitcherProTM  
Software Tool at www.ti.com/switcherpro.  
•
SIMPLIFIED SCHEMATIC  
For more SWIFTTM documentation, see the TI  
website at www.ti.com/swift.  
VIN  
C
BOOT  
VIN  
BOOT  
R4  
R5  
C
I
TPS54218  
L
O
VOUT  
100  
95  
90  
85  
80  
75  
70  
EN  
PH  
C
O
R
1
PWRGD  
VSENSE  
SS  
RT /CLK  
COMP  
GND  
R
2
AGND  
C
POWERPAD  
ss  
65  
V = 5 V,  
I
R
R
T
3
60  
55  
50  
V
F
= 1.8 V,  
O
= 1000 kHz  
S
C
1
0
0.25 0.5  
0.75  
1
- Output Current - A  
1.25 1.5  
1.75  
2
I
O
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.  
2
SWIFT is a trademark 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 © 2009, Texas Instruments Incorporated  
1234567...34

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TPS54218 替代型号

型号 品牌 替代类型 描述 数据表
TPS8268090 TI

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