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LM34917ATLX/NOPB PDF预览

LM34917ATLX/NOPB

更新时间： 2024-11-10 19:23:31
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
22页 1007K
描述
IC,SMPS CONTROLLER,CURRENT-MODE,BGA,12PIN,PLASTIC

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LM34917ATLX/NOPB 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Obsolete包装说明：FBGA, BGA12,3X4,20
Reach Compliance Code：unknown风险等级：5.75
控制模式：CURRENT-MODEJESD-30 代码：R-PBGA-B12
JESD-609代码：e1湿度敏感等级：1
端子数量：12封装主体材料：PLASTIC/EPOXY
封装代码：FBGA封装等效代码：BGA12,3X4,20
封装形状：RECTANGULAR封装形式：GRID ARRAY, FINE PITCH
认证状态：Not Qualified子类别：Switching Regulator or Controllers
表面贴装：YES最大切换频率：2000 kHz
端子面层：Tin/Silver/Copper (Sn/Ag/Cu)端子形式：BALL
端子节距：0.5 mm端子位置：BOTTOM
Base Number Matches：1

LM34917ATLX/NOPB 数据手册

 浏览型号LM34917ATLX/NOPB的Datasheet PDF文件第2页浏览型号LM34917ATLX/NOPB的Datasheet PDF文件第3页浏览型号LM34917ATLX/NOPB的Datasheet PDF文件第4页浏览型号LM34917ATLX/NOPB的Datasheet PDF文件第5页浏览型号LM34917ATLX/NOPB的Datasheet PDF文件第6页浏览型号LM34917ATLX/NOPB的Datasheet PDF文件第7页 
LM34917A  
www.ti.com  
SNOSAX7D –DECEMBER 2007–REVISED MARCH 2013  
LM34917A Ultra Small 33V, 1.25A Constant On-Time Buck Switching Regulator with  
Intelligent Current Limit  
Check for Samples: LM34917A  
1
FEATURES  
PACKAGE  
2
•
Functional Input Voltage Range: 8V to 33V  
DSBGA package  
•
12-Bump DSBGA Package  
•
•
•
•
•
DESCRIPTION  
Input Over-Voltage Shutdown at ≊35V  
Transient Capability to 50V  
The LM34917A Step-Down Switching Regulator  
features all the functions needed to implement a low  
cost, efficient, buck bias regulator capable of  
supplying at least 1.25A to the load. To reduce  
excessive switch current due to the possibility of a  
saturating inductor the valley current limit threshold  
changes with input and output voltages, and the on-  
time is reduced when current limit is detected. This  
buck regulator contains an N-Channel Buck Switch,  
and is available in the 12 pin DSBGA package. The  
constant on-time feedback regulation scheme  
requires no loop compensation, results in fast load  
Integrated N-Channel buck switch  
Valley current limit varies with VIN and VOUT to  
reduce excessive inductor current  
•
•
•
•
•
•
On-time is reduced when in current limit  
Integrated start-up regulator  
No loop compensation required  
Ultra-Fast transient response  
Maximum switching frequency: 2 MHz  
transient  
response,  
and  
simplifies  
circuit  
Operating frequency remains nearly constant  
with load current and input voltage variations  
implementation. The operating frequency remains  
constant with line and load variations due to the  
inverse relationship between the input voltage and  
the on-time. The valley current limit results in a  
smooth transition from constant voltage to constant  
current mode when current limit is detected, reducing  
the frequency and output voltage, without the use of  
foldback. Additional features include: VCC under-  
voltage lock-out, input over-voltage shutdown,  
thermal shutdown, gate drive under-voltage lock-out,  
and maximum duty cycle limit.  
•
•
•
•
Programmable soft-start  
Precision internal reference  
Adjustable output voltage  
Thermal shutdown  
TYPICAL APPLICATIONS  
•
•
•
High Efficiency Point-Of-Load (POL) Regulator  
Non-Isolated Buck Regulator  
Secondary High Voltage Post Regulator  
Basic Step Down Regulator  
8V - 33V  
Input  
VIN  
VCC  
C3  
C1  
LM34917A  
R
ON  
BST  
SW  
L1  
RON/SD  
SS  
C4  
V
OUT  
SHUT  
DOWN  
C8  
C7  
D1  
R3  
C2  
R1  
R2  
ISEN  
FB  
C6  
RTN  
SGND  
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 © 2007–2013, Texas Instruments Incorporated  
1234567...22

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LM34917ATLX/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM34917ATL/NOPB TI

完全替代

 具有智能限流功能的 2.3x2mm、8-33V、1.25A、恒定导通时间非同步降压稳压器

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