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LM5007MMEP

更新时间： 2024-11-28 13:00:43
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德州仪器 - TI 稳压器开关
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LM5007  
www.ti.com  
SNVS252F –SEPTEMBER 2003–REVISED MARCH 2013  
High Voltage (80V) Step Down Switching Regulator  
Check for Samples: LM5007  
1
FEATURES  
DESCRIPTION  
The LM5007 Step Down Switching Regulator features  
all of the functions needed to implement low cost,  
efficient, Buck bias regulators. This high voltage  
regulator contains an 80 V, 0.7A N-Channel Buck  
Switch. The device is easy to apply and is provided in  
the VSSOP-8 and the thermally enhanced WSON-8  
packages. The regulator is based on a hysteretic  
control scheme using an on time inversely  
proportional to VIN. This feature allows the operating  
frequency to remain relatively constant with load and  
input voltage variations. The hysteretic control  
requires no control loop compensation, while  
providing very fast load transient response. An  
intelligent current limit is implemented in the LM5007  
with forced off time that is inversely proportional to  
VOUT. This current limiting scheme reduces load  
current foldback. Additional protection features  
include: Thermal Shutdown, Vcc undervoltage  
lockout, gate drive undervoltage lockout, and Max  
Duty Cycle limiter.  
2
•
•
•
•
•
•
Integrated 80V, 0.7A N-Channel Buck Switch  
Internal HV Vcc Regulator  
No Control Loop Compensation Required  
Ultra-Fast Transient Response  
On Time Varies Inversely with Line Voltage  
Operating Frequency Nearly Constant with  
Varying Line Voltage  
•
•
•
•
•
•
•
•
Adjustable Output Voltage  
Highly Efficient Operation  
Precision Reference  
Low Bias Current  
Intelligent Current Limit Protection  
Thermal Shutdown  
External Shutdown Control  
VSSOP-8 and WSON-8 (4mm x 4mm) Packages  
APPLICATIONS  
•
•
•
Non-Isolated Buck Regulator  
Secondary High Voltage Post Regulator  
+42V Automotive Systems  
Connection Diagram  
1
2
3
4
8
SW  
VIN  
7
VCC  
BST  
RCL  
6
RON  
5
RTN  
FB  
Figure 1. 8-Lead VSSOP or WSON  
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.  
All trademarks are the property of their respective owners.  
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 © 2003–2013, Texas Instruments Incorporated  
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