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TPS54341_15

更新时间： 2024-11-22 01:08:51
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德州仪器 - TI /
页数 文件大小 规格书
48页 2124K
描述
4.5-V to 42-V Input, 3.5-A Step-Down DC-DC Converter With Soft-Start and Eco-mode™

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TPS54341  
www.ti.com  
SLVSC61 –NOVEMBER 2013  
4.5-V to 42-V Input, 3.5-A Step-Down DC-DC Converter With Soft-Start and Eco-mode™  
Check for Samples: TPS54341  
1
FEATURES  
DESCRIPTION  
The TPS54341 device is a 42-V 3.5-A step-down  
regulator with an integrated high-side MOSFET. The  
device survives load-dump pulses up to 45 V per ISO  
7637. Current mode control provides simple external  
compensation and flexible component selection. A  
low-ripple pulse-skip mode reduces the no-load  
supply current to 152 μA. Shutdown supply current is  
reduced to 2 μA when the enable pin is pulled low.  
23  
•
High Efficiency at Light Loads with Pulse  
Skipping Eco-mode™  
•
•
87-mΩ High-Side MOSFET  
152-μA Operating Quiescent Current and  
2-μA Shutdown Current  
•
100-kHz to 2.5-MHz Adjustable Switching  
Frequency  
Undervoltage lockout is internally set at 4.3 V but can  
increase using an external resistor divider at the  
enable pin. The output voltage startup ramp is  
controlled by the soft start pin that can also be  
configured for sequencing/tracking. An open-drain  
power-good signal indicates the output is within 93%  
to 106% of the nominal voltage.  
•
•
Synchronizes to External Clock  
Low Dropout at Light Loads with Integrated  
BOOT Recharge FET  
•
•
•
•
•
•
•
Adjustable UVLO Voltage and Hysteresis  
UV and OV Power-Good Output  
Adjustable Soft-Start and Sequencing  
0.8-V 1% Internal Voltage Reference  
10-Pin SON with Thermal Pad Package  
–40°C to 150°C TJ Operating Range  
Supported by WEBENCH® Software Tool  
A wide adjustable switching-frequency range allows  
for optimization of either efficiency or external  
component size. Cycle-by-cycle current limit,  
frequency foldback and thermal shutdown protects  
internal and external components during an overload  
condition.  
APPLICATIONS  
The TPS54341 device is available in a 10-pin 4-mm ×  
4-mm SON package.  
•
•
Industrial Automation and Motor Control  
Vehicle Accessories: GPS (see SLVA412),  
Entertainment  
•
•
USB-Dedicated Charging Ports and Battery  
Chargers (see SLVA464)  
12-V and 24-V Industrial, Automotive and  
Communications Power Systems  
SIMPLIFIED SCHEMATIC  
EFFICIENCY vs LOAD CURRENT  
100  
VIN  
PWRGD  
VIN  
36 V to 12 V  
95  
TPS54341  
90  
85  
BOOT  
EN  
RT/CLK  
SS/TR  
VOUT  
12 V to 3.3 V  
SW  
80  
12 V to 5 V  
75  
70  
COMP  
FB  
VOUT = 12 V, fsw = 620 kHz,  
VOUT = 5 V and 3.3 V, f sw = 400 kHz  
65  
60  
GND  
0
0.5  
1
1.5  
2
2.5  
3
3.5  
C099  
IO - Output 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.  
2
3
Eco-mode is a trademark of Texas Instruments.  
WEBENCH is a registered 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 © 2013, Texas Instruments Incorporated  
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