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LM34923MMX/NOPB PDF预览

LM34923MMX/NOPB

更新时间: 2024-09-19 11:15:23
品牌 Logo 应用领域
德州仪器 - TI 开关稳压器
页数 文件大小 规格书
29页 1615K
描述
80V、600mA 恒定导通时间降压开关稳压器 | DGS | 10 | -40 to 125

LM34923MMX/NOPB 数据手册

 浏览型号LM34923MMX/NOPB的Datasheet PDF文件第2页浏览型号LM34923MMX/NOPB的Datasheet PDF文件第3页浏览型号LM34923MMX/NOPB的Datasheet PDF文件第4页浏览型号LM34923MMX/NOPB的Datasheet PDF文件第5页浏览型号LM34923MMX/NOPB的Datasheet PDF文件第6页浏览型号LM34923MMX/NOPB的Datasheet PDF文件第7页 
LM34923  
www.ti.com  
SNVS695A MARCH 2011REVISED FEBRUARY 2013  
80-V 600-mA Constant On-Time Buck Switching Regulator  
Check for Samples: LM34923  
1
FEATURES  
DESCRIPTION  
The LM34923 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 80V N-Channel  
MOSFET Switch and a startup regulator. The device  
is easy to implement and is provided in an 10-pin  
VSSOP package. The regulator’s control scheme  
uses an on-time inversely proportional to VIN. This  
feature results in the operating frequency remaining  
relatively constant with line and load variations. The  
control scheme requires no loop compensation,  
resulting in fast transient response. An intelligent  
current limit is implemented with a 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 Lock-out, Max Duty Cycle  
Limiter, a Pre-charge Switch, and a programmable  
Under Voltage Detector with a status flag output.  
2
Operating Input Voltage Range: 6V to 75V  
Integrated 80V, N-Channel Buck Switch  
Internal Start-up Regulator  
No Loop Compensation Required  
Ultra-Fast Transient Response  
Operating Frequency Remains Constant with  
Line and Load Variations  
Adjustable Output voltage From 2.5V  
Precision Internal Reference, ±2.5%  
Intelligent Current Limit Reduces Foldback  
Programmable Input UV Detector with Status  
Flag Output  
Pre-charge Switch Enables Bootstrap Gate  
Drive with No Load  
Thermal Shutdown  
10-Pin VSSOP Package  
APPLICATIONS  
Non-Isolated Telecommunication Buck  
Regulator  
Secondary High Voltage Post Regulator  
+42V Automotive Systems  
Typical Application, Basic Step-Down Regulator  
6V - 75V  
Input  
V
VIN  
VCC  
C3  
IN  
LM34923  
C1  
R
T
GND  
BST  
C4  
L1  
RT/SD  
UV  
SW  
SHUTDOWN  
V
OUT  
R
UV2  
D1  
R3  
C2  
R
FB2  
R
UV1  
FB  
R
UVO  
GND  
R
FB1  
UVO  
RTN  
UV STATUS  
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 © 2011–2013, Texas Instruments Incorporated  

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适用于隔离式直流/直流转换器的 7.5V 至 100V 宽输入电压、100mA 集成二次侧
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适用于隔离式直流/直流转换器的 7.5V 至 100V 宽输入电压、300mA 集成二次侧
LM34926MR/NOPB TI

获取价格

适用于隔离式直流/直流转换器的 7.5V 至 100V 宽输入电压、300mA 集成二次侧
LM34926MRX/NOPB TI

获取价格

适用于隔离式直流/直流转换器的 7.5V 至 100V 宽输入电压、300mA 集成二次侧
LM34926SD/NOPB TI

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适用于隔离式直流/直流转换器的 7.5V 至 100V 宽输入电压、300mA 集成二次侧
LM34926SDX/NOPB TI

获取价格

适用于隔离式直流/直流转换器的 7.5V 至 100V 宽输入电压、300mA 集成二次侧