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TPS54040-Q1

更新时间： 2024-11-23 11:58:23
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德州仪器 - TI 转换器
页数 文件大小 规格书
53页 2159K
描述
0.5-A 42-V STEP-DOWN SWIFT™ DC/DC CONVERTER WITH Eco-mode™

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TPS54040-Q1 数据手册

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TPS54040-Q1  
www.ti.com  
SLVSA26D –JANUARY 2010–REVISED AUGUST 2012  
0.5-A 42-V STEP-DOWN SWIFT™ DC/DC CONVERTER  
WITH Eco-mode™  
Check for Samples: TPS54040-Q1  
1
FEATURES  
2
•
•
•
•
Qualified for Automotive Applications  
•
Adjustable Undervoltage Lockout Voltage and  
Hysteresis  
3.5-V to 42-V Input Voltage Range  
•
•
0.8-V Internal Voltage Reference  
200-mΩ High-Side MOSFET  
Supported by SwitcherPro™ Software Tool  
(http://focus.ti.com/docs/toolsw/folders/print/s  
witcherpro.html)  
High Efficiency at Light Loads with a Pulse  
Skipping Eco-mode™ Control Scheme  
•
•
•
•
•
•
116-μA Operating Quiescent Current  
1.3-μA Shutdown Current  
•
For SWIFT™ Documentation, See the TI  
Website at http://www.ti.com/swift  
100-kHz to 2.5-MHz Switching Frequency  
Synchronizes to External Clock  
Adjustable Slow Start/Sequencing  
APPLICATIONS  
•
12-V and 24-V Industrial and Commercial Low  
Power Systems  
Undervoltage and Overvoltage Power-good  
Output  
•
Aftermarket Auto Accessories: Video, GPS,  
Entertainment  
DESCRIPTION  
The TPS54040 device is a 42-V 0.5-A step-down regulator with an integrated high-side MOSFET. Current mode  
control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode  
reduces the no load, input supply current to 116 μA. Using the enable pin, shutdown supply current is reduced to  
1.3 μA, when the enable pin is low.  
Undervoltage lockout is internally set at 2.5 V, but can be increased using the enable pin. The output voltage  
startup ramp is controlled by the slow start pin that can also be configured for sequencing or tracking. An open  
drain power-good signal indicates the output is within 92% to 109% of its nominal voltage.  
A wide switching frequency range allows efficiency and external component size to be optimized. Frequency fold  
back and thermal shutdown protects the part during an overload condition.  
The TPS54040 is available in a 10-pin thermally enhanced MSOP PowerPAD™ package (DGQ) and a 10-pin  
SON package (DRC).  
SIMPLIFIED SCHEMATIC  
EFFICIENCY  
vs  
LOAD CURRENT  
VIN  
PWRGD  
TPS54040  
100  
90  
80  
70  
60  
50  
EN  
BOOT  
PH  
40  
SS/TR  
RT/CLK  
COMP  
30  
20  
VI = 12 V,  
VO = 5.0 V,  
fsw = 700 kHz  
VSENSE  
GND  
10  
0
0
0.1  
0.2  
0.3  
0.4  
0.5  
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.  
Eco-mode, SwitcherPro, SWIFT, PowerPAD are trademarks of Texas Instruments.  
2
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 © 2010–2012, Texas Instruments Incorporated  
 
 
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