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TPS57140-Q1

更新时间： 2024-11-23 12:21:47
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德州仪器 - TI 转换器
页数 文件大小 规格书
49页 1717K
描述
1.5-A 42-V STEP-DOWN SWIFT™ DC/DC CONVERTER WITH Eco-mode™ CONTROL

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TPS57140-Q1 数据手册

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TPS57140-Q1  
www.ti.com  
SLVSAP3A –DECEMBER 2010–REVISED MARCH 2011  
1.5-A 42-V STEP-DOWN SWIFT™ DC/DC CONVERTER  
WITH Eco-mode™ CONTROL  
Check for Samples: TPS57140-Q1  
1
FEATURES  
•
Adjustable Undervoltage Lockout Voltage and  
Hysteresis  
2
•
•
•
•
Qualified for Automotive Applications  
3.5-V to 42-V Input Voltage Range  
200-mΩ High-Side MOSFET  
•
•
0.8-V Internal Voltage Reference  
Supported by SwitcherPro™ Software Tool  
(http://focus.ti.com/docs/toolsw/folders/print/s  
witcherpro.html)  
High Efficiency at Light Loads With  
Pulse-Skipping Eco-mode™ Control Scheme  
•
For SWIFT™ Documentation, See the TI  
Website at http://www.ti.com/swift  
•
•
•
•
•
•
116-μA Operating Quiescent Current  
1.5-μA Shutdown Current  
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  
•
Aftermarket Automotive Accessories: Video,  
GPS, Entertainment  
Undervoltage and Overvoltage Power Good  
Output  
DESCRIPTION  
The TPS57140-Q1 device is a 42-V 1.5-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, regulated output supply current to 116 μA. Using the enable pin, shutdown  
supply current is reduced to 1.5 μA.  
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/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 TPS57140-Q1 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  
90  
85  
80  
75  
70  
65  
60  
55  
50  
TPS57140-Q1  
EN  
BOOT  
PH  
SS/TR  
RT/CLK  
COMP  
VI = 12 V,  
VO = 3.3 V,  
fsw = 1200 kHz  
VSENSE  
GND  
0
0.25  
0.50 0.75  
1
1.25 1.50  
1.75  
2
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 © 2010–2011, Texas Instruments Incorporated  
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