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LM2650M-ADJ PDF预览

LM2650M-ADJ

更新时间: 2024-11-23 00:01:07
品牌 Logo 应用领域
美国国家半导体 - NSC 转换器稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
12页 207K
描述
Synchronous Step-Down DC/DC Converter

LM2650M-ADJ 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:SOP-24Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.16模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:VOLTAGE-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:18 V最小输入电压:4.5 V
标称输入电压:15 VJESD-30 代码:R-PDSO-G24
JESD-609代码:e0长度:15.4 mm
湿度敏感等级:3功能数量:1
端子数量:24最高工作温度:125 °C
最低工作温度:-40 °C最大输出电流:7.5 A
标称输出电压:5 V封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP24,.4
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:2.65 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:370 kHz技术:MOS
温度等级:AUTOMOTIVE端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL处于峰值回流温度下的最长时间:40
宽度:7.5 mmBase Number Matches:1

LM2650M-ADJ 数据手册

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November 2000  
LM2650  
Synchronous Step-Down DC/DC Converter  
General Description  
Features  
n Ultra high efficiencies (95% possible)  
The LM2650 is a step-down DC/DC converter featuring high  
efficiency over a 3A to milliamperes load range. This feature  
makes the LM2650 an ideal fit in battery-powered applica-  
tions that demand long battery life in both run and standby  
modes.  
n High efficiency over a 3A to milliamperes load range  
n Synchronous switching of internal NMOS power FETs  
n Wide input voltage range (4.5V to 18V)  
n Output voltage adjustable from 1.5V to 16V  
n Automatic low-power sleep mode  
n Logic-controlled micropower shutdown (IQSD 25 µA)  
n Frequency adjustable up to 300 kHz  
n Frequency synchronization with external signal  
n Programmable soft-start  
The LM2650 also features a logic-controlled shutdown mode  
in which it draws at most 25µA from the input power supply.  
The LM2650 employs a fixed-frequency pulse-width modu-  
lation (PWM) and synchronous rectification to achieve very  
high efficiencies. In many applications, efficiencies reach  
95%+ for loads around 1A and exceed 90% for moderate to  
heavy loads from 0.2A to 2A.  
n Short-circuit current limiting  
n Thermal shutdown  
n Available in 24-lead Small-Outline package  
A low-power hysteretic or sleepmode keeps efficiencies  
high at light loads. The LM2650 enters and exits sleep mode  
automatically as the load crosses sleep inand sleep out″  
thresholds. The LM2650 provides nodes for programming  
both thresholds via external resistors. A logic input allows the  
user to override the automatic sleep feature and keep the  
LM2650 in PWM mode regardless of the load level.  
Applications  
n Notebook and palmtop personal computers  
n Portable data terminals  
n Modems  
An optional soft-start feature limits current surges from the  
input power supply at start up and provides a simple means  
of sequencing multiple power supplies.  
n Portable Instruments  
n Global positioning devices (GPSs)  
n Battery-powered digital devices  
Typical Application  
LM2650-ADJ Efficiency  
DS012848-2  
DS012848-1  
Converting a Four-Cell Li Ion Battery to 5V  
© 2000 National Semiconductor Corporation  
DS012848  
www.national.com  

LM2650M-ADJ 替代型号

型号 品牌 替代类型 描述 数据表
LM2650MX-ADJ NSC

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