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LM25576

更新时间： 2024-10-28 02:58:15
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德州仪器 - TI /
页数 文件大小 规格书
29页 1034K
描述
SIMPLE SWITCHER 42V, 3A Step-Down Switching Regulator

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LM25576 数据手册

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LM25576, LM25576-Q1  
www.ti.com  
SNVS470G –JANUARY 2007–REVISED APRIL 2013  
LM25576/LM25576-Q1 SIMPLE SWITCHER® 42V, 3A Step-Down Switching Regulator  
Check for Samples: LM25576, LM25576-Q1  
1
FEATURES  
DESCRIPTION  
The LM25576 is an easy to use SIMPLE  
SWITCHER® buck regulator which allows design  
engineers to design and optimize a robust power  
23  
•
LM25576-Q1 is an Automotive Grade Product  
that is AEC-Q100 Grade 1 Qualified (−40°C to +  
125°C Operating Junction Temperature)  
supply using  
a
minimum set of components.  
•
•
•
•
•
Integrated 42V, 170mΩ N-channel MOSFET  
Ultra-Wide Input Voltage Range from 6V to 42V  
Adjustable Output Voltage as Low as 1.225V  
1.5% Feedback Reference Accuracy  
Operating with an input voltage range of 6 - 42V, the  
LM25576 delivers 3A of continuous output current  
with an integrated 170mΩ N-Channel MOSFET. The  
regulator utilizes an Emulated Current Mode  
architecture which provides inherent line regulation,  
tight load transient response, and ease of loop  
compensation without the usual limitation of low-duty  
cycles associated with current mode regulators. The  
operating frequency is adjustable from 50kHz to  
1MHz to allow optimization of size and efficiency. To  
reduce EMI, a frequency synchronization pin allows  
multiple IC’s from the LM(2)557x family to self-  
synchronize or to synchronize to an external clock.  
The LM25576 ensures robustness with cycle-by-cycle  
current limit, short-circuit protection, thermal shut-  
down, and remote shut-down. The device is available  
in a power enhanced HTSSOP-20 package featuring  
an exposed die attach pad for thermal dissipation.  
The LM25576 is supported by the full suite of  
WEBENCH® On-Line design tools.  
Operating Frequency Adjustable Between  
50kHz and 1MHz with Single Resistor  
•
•
•
•
•
•
Master or Slave Frequency Synchronization  
Adjustable Soft-Start  
Emulated Current Mode Control Architecture  
Wide Bandwidth Error Amplifier  
Built-in Protection  
Automotive Grade Product Datasheet that is  
AEC-Q100 Grade 0 Qualified is Available Upon  
Request.  
–
(−40°C to + 150°C Operating Junction  
Temperature)  
APPLICATIONS  
PACKAGE  
•
•
Automotive  
Industrial  
•
HTSSOP-20EP (Exposed Pad)  
Simplified Application Schematic  
VIN  
BST  
SW  
VIN  
VOUT  
SYNC  
LM25576  
SD  
IS  
OUT  
FB  
RT  
VCC  
SS  
COMP  
GND  
RAMP  
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.  
WEBENCH is a registered trademark of Texas Instruments.  
2
3
All other trademarks are the property of their respective owners.  
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 © 2007–2013, Texas Instruments Incorporated  
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