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LM2655

更新时间: 2024-01-25 15:11:14
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
17页 360K
描述
2.5A High Efficiency Synchronous Switching Regulator

LM2655 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:TSSOP
包装说明:TSSOP,针数:16
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01Factory Lead Time:1 week
风险等级:0.9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: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:e3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:2.5 A
最大输出电压:13 V最小输出电压:3.3 V
封装主体材料:PLASTIC/EPOXY封装代码:TSSOP
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:1.1 mm表面贴装:YES
切换器配置:BUCK最大切换频率:345 kHz
温度等级:AUTOMOTIVE端子面层:Matte Tin (Sn)
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:NOT SPECIFIED
宽度:4.4 mm

LM2655 数据手册

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February 2000  
LM2655  
2.5A High Efficiency Synchronous Switching Regulator  
General Description  
Features  
%
n Ultra-high efficiency up to 96  
The LM2655 is a current-mode controlled PWM step-down  
switching regulator. It has the unique ability to operate in  
synchronous or asynchronous mode. This gives the de-  
signer flexibility to choose between the high efficiency of  
synchronous operation, or the low solution cost of asynchro-  
nous operation. Along with flexibility, the LM2655 offers high  
power density with the small footprint of a TSSOP-16 pack-  
age.  
n 4V to 14V input voltage range  
n Internal high-side MOSFET with low RDS(ON) = 0.033  
n 300 kHz fixed frequency internal oscillator  
n Low-side drive for synchronous operation  
n Guaranteed less than 12 µA shutdown current  
n Patented current sensing for current mode control  
n Programmable soft-start  
>
High efficiency ( 90%) is obtained through the use of an in-  
n Input undervoltage lockout  
ternal low ON-resistance (33m) MOSFET, and an external  
N-Channel MOSFET. This feature, together with its low qui-  
escent current, makes the LM2655 an ideal fit in portable ap-  
plications.  
n Output overvoltage shutdown protection  
n Output undervoltage shutdown protection  
n Thermal Shutdown  
n 16-pin TSSOP package  
Integrated in the LM2655 are all the power, control, and drive  
functions for asynchronous operation. In addition, a low-side  
driver output allows easy synchronous operation. The IC  
uses patented current sensing circuitry that eliminates the  
external current sensing resistor required by other current-  
mode DC-DC converters. A programmable soft-start feature  
limits start up current surges and provides a means of se-  
quencing multiple power supplies.  
Applications  
n Hard disk drives  
n Internet appliances  
n TFT monitors  
n Computer peripherals  
n Battery powered devices  
Typical Application  
DS101284-29  
© 2000 National Semiconductor Corporation  
DS101284  
www.national.com  

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