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LM5008AMM/NOPB

更新时间: 2024-09-28 12:02:15
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德州仪器 - TI 稳压器开关
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23页 1047K
描述
100-V 350-mA Constant On-Time Buck Switching Regulator

LM5008AMM/NOPB 数据手册

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LM5008A  
www.ti.com  
SNVS583F MARCH 2009REVISED MARCH 2013  
100-V 350-mA Constant On-Time Buck Switching Regulator  
Check for Samples: LM5008A  
1
FEATURES  
DESCRIPTION  
The LM5008A is a functional variant of the LM5008  
COT Buck Switching Regulator. The functional  
differences of the LM5008A are: the minimum input  
operating voltage is 6 V, the on-time equation is  
slightly different, and the requirement for a minimum  
load current is removed.  
2
Operating input voltage range: 6V to 95V  
Integrated 100V N-Channel buck switch  
Internal start-up regulator  
No loop compensation required  
Ultra-fast transient response  
The LM5008A Step Down Switching Regulator  
features all of the functions needed to implement a  
low cost, efficient, Buck bias regulator. This high  
voltage regulator contains an 100 V N-Channel Buck  
Switch. The device is easy to implement and is  
provided in the VSSOP-8 and the thermally enhanced  
WSON-8 packages. The regulator is based on a  
control scheme using an ON time inversely  
proportional to VIN. This feature allows the operating  
frequency to remain relatively constant. The control  
scheme requires no loop compensation. An intelligent  
current limit is implemented with forced OFF time,  
which is inversely proportional to Vout. This scheme  
ensures short circuit control while providing minimum  
foldback. Other features include: Thermal Shutdown,  
VCC under-voltage lockout, Gate drive under-voltage  
lockout, Max Duty Cycle limiter, and a pre-charge  
switch.  
On time varies inversely with input voltage  
Operating frequency remains constant with  
varying line voltage and load current  
Adjustable output voltage from 2.5V  
Highly efficient operation  
Precision internal reference  
Low bias current  
Intelligent current limit  
Thermal shutdown  
VSSOP-8 and WSON-8 (4mm x 4mm) packages  
APPLICATIONS  
Non-Isolated Telecommunication Buck  
Regulator  
Secondary High Voltage Post Regulator  
+42V Automotive Systems  
Typical Application, Basic Step-Down Regulator  
6V - 95V  
Input  
V
VCC  
C3  
VIN  
IN  
C1  
LM5008A  
R
T
BST  
GND  
C4  
L1  
RT/SD  
RCL  
V
OUT  
SW  
FB  
D1  
SHUTDOWN  
R3  
R
R
FB2  
R
CL  
C2  
RTN  
GND  
FB1  
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 © 2009–2013, Texas Instruments Incorporated  

LM5008AMM/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM5008AMMX/NOPB TI

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