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LM34930TLX PDF预览

LM34930TLX

更新时间: 2024-09-18 05:42:03
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器开关式稳压器或控制器电源电路开关式控制器
页数 文件大小 规格书
18页 370K
描述
Ultra Small 33V, 1A Constant On-Time Buck Switching Regulator with Intelligent Current Limit

LM34930TLX 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:1.77 X 2.10 MM, MICRO, SMD-12Reach Compliance Code:unknown
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.23Is Samacsys:N
其他特性:ALSO OPERATES IN ADJUSTABLE MODE FROM 2.5 V模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE最大输入电压:33 V
最小输入电压:8 V标称输入电压:12 V
JESD-30 代码:R-PBGA-B12JESD-609代码:e0
长度:2.073 mm湿度敏感等级:1
功能数量:1端子数量:12
最高工作温度:125 °C最低工作温度:-40 °C
最大输出电流:1.35 A封装主体材料:PLASTIC/EPOXY
封装代码:VFBGA封装等效代码:BGA12,3X4,20
封装形状:RECTANGULAR封装形式:GRID ARRAY, VERY THIN PROFILE, FINE PITCH
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:0.675 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:BUCK
最大切换频率:2000 kHz温度等级:AUTOMOTIVE
端子面层:TIN LEAD端子形式:BALL
端子节距:0.5 mm端子位置:BOTTOM
处于峰值回流温度下的最长时间:40宽度:1.768 mm
Base Number Matches:1

LM34930TLX 数据手册

 浏览型号LM34930TLX的Datasheet PDF文件第2页浏览型号LM34930TLX的Datasheet PDF文件第3页浏览型号LM34930TLX的Datasheet PDF文件第4页浏览型号LM34930TLX的Datasheet PDF文件第5页浏览型号LM34930TLX的Datasheet PDF文件第6页浏览型号LM34930TLX的Datasheet PDF文件第7页 
June 23, 2008  
LM34930  
Ultra Small 33V, 1A Constant On-Time Buck Switching  
Regulator with Intelligent Current Limit  
General Description  
Features  
The LM34930 constant On-Time Step Down Switching Reg-  
ulator features all the functions needed to implement a low  
cost, efficient, buck bias regulator capable of supplying in ex-  
cess of 1A load current. This high voltage regulator contains  
an N-Channel Buck Switch, and is available in a µSMD  
bumped package. The constant on-time regulation principle  
requires no loop compensation, results in fast load transient  
response, and simplifies circuit implementation. The operat-  
ing frequency remains constant with line and load. The valley  
current limit results in a smooth transition from constant volt-  
age to constant current mode when current limit is detected  
without the use of current limit foldback. To reduce the pos-  
sibility of saturating the inductor the valley current limit thresh-  
old reduces as the input voltage increases, and the on-time  
is reduced when current limit is detected. Additional features  
include: Over-voltage indicator, Input over-voltage shutdown,  
Vcc under-voltage lock-out, thermal shutdown, and maximum  
duty cycle limiting.  
Operating Input Voltage Range: 8V to 33V  
Input over-voltage shutdown at 36V  
Input absolute maximum rating of 44V  
Integrated 1A N-Channel buck switch  
Adjustable output voltage from 2.5V  
Switching frequency adjustable to 2 MHz  
Switching frequency remains nearly constant with load  
current and input voltage  
Ultra-fast transient response  
No loop compensation required  
Adjustable soft-start timing  
Thermal shutdown  
Precision 2% feedback reference  
Input Over-Voltage indicator at 19V  
Current limit scheme helps prevent inductor from  
saturation in load fault conditions  
Package  
Micro SMD –12, 1.77 mm x 2.1 mm  
Typical Application, Basic Step-Down Regulator  
30060801  
© 2008 National Semiconductor Corporation  
300608  
www.national.com  

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