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LM2651MTCX-3.3 PDF预览

LM2651MTCX-3.3

更新时间: 2024-11-02 04:44:39
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器开关
页数 文件大小 规格书
10页 226K
描述
1.5A High Efficiency Synchronous Switching Regulator

LM2651MTCX-3.3 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:TSSOP-16Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.11模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:14 V最小输入电压:4 V
标称输入电压:10 VJESD-30 代码:R-PDSO-G16
JESD-609代码:e0长度:5 mm
湿度敏感等级:1功能数量:1
端子数量:16最高工作温度:125 °C
最低工作温度:-40 °C最大输出电流:2.6 A
封装主体材料:PLASTIC/EPOXY封装代码:TSSOP
封装等效代码:TSSOP16,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:1.2 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:SINGLE最大切换频率:345 kHz
技术:CMOS温度等级:AUTOMOTIVE
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:0.65 mm端子位置:DUAL
处于峰值回流温度下的最长时间:40宽度:4.4 mm
Base Number Matches:1

LM2651MTCX-3.3 数据手册

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February 2000  
LM2651  
1.5A High Efficiency Synchronous Switching Regulator  
General Description  
Features  
%
n Ultra high efficiency up to 97  
The LM2651 switching regulator provides high efficiency  
power conversion over a 100:1 load range (1.5A to 15mA).  
This feature makes the LM2651 an ideal fit in  
battery-powered applications that demand long battery life in  
both run and standby modes.  
n High efficiency over a 1.5A to milliamperes load range  
n 4V to 14V input voltage range  
n 1.8V, 2.5V, 3.3V, or ADJ output voltage  
n Internal MOSFET switch with low RDS(on) of 75m  
n 300kHz fixed frequency internal oscillator  
n 7µA shutdown current  
n Patented current sensing for current mode control  
n Input undervoltage lockout  
n Adjustable soft-start  
%
Synchronous rectification is used to achieve up to 97 effi-  
ciency. At light loads, the LM2651 enters a low power hyster-  
etic or “sleep” mode to keep the efficiency high. In many ap-  
plications, the efficiency still exceeds 80 at 15mA load. A  
shutdown pin is available to disable the LM2651 and reduce  
the supply current to less than 10µA.  
%
n Current limit and thermal shutdown  
n 16-pin TSSOP package  
The LM2651 contains a patented current sensing circuitry for  
current mode control. This feature eliminates the external  
current sensing resistor required by other current-mode  
DC-DC converters.  
Applications  
n Personal digital assistants (PDAs)  
n Computer peripherals  
n Battery-powered devices  
n Handheld scanners  
n High efficiency 5V conversion  
The LM2651 has a 300 kHz fixed frequency internal oscilla-  
tor. The high oscillator frequency allows the use of extremely  
small, low profile components.  
A programmable soft-start feature limits current surges from  
the input power supply at start up and provides a simple  
means of sequencing multiple power supplies.  
Other protection features include input undervoltage lockout,  
current limiting, and thermal shutdown.  
Typical Application  
DS100925-1  
DS100925-15  
Efficiency vs Load Current  
=
=
(VIN 5V, VOUT 3.3V)  
© 2000 National Semiconductor Corporation  
DS100925  
www.national.com  

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