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LM2670T-5.0 PDF预览

LM2670T-5.0

更新时间： 2024-09-28 22:36:55
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器
页数 文件大小 规格书
23页 364K
描述
SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync

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中文翻译

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LM2670T-5.0 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：TO-220, 7 PINReach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.1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：40 V最小输入电压：8 V
标称输入电压：12 VJESD-30 代码：R-PZFM-T7
JESD-609代码：e0湿度敏感等级：1
功能数量：1端子数量：7
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：5.4 A封装主体材料：PLASTIC/EPOXY
封装代码：TO-220封装等效代码：ZIP7H,.16,.7TB
封装形状：RECTANGULAR封装形式：FLANGE MOUNT
峰值回流温度（摄氏度）：260认证状态：Not Qualified
子类别：Switching Regulator or Controllers表面贴装：NO
切换器配置：BUCK最大切换频率：280 kHz
温度等级：AUTOMOTIVE端子面层：Tin/Lead (Sn/Pb)
端子形式：THROUGH-HOLE端子节距：1.27 mm
端子位置：ZIG-ZAG处于峰值回流温度下的最长时间：40
Base Number Matches：1

LM2670T-5.0 数据手册

 浏览型号LM2670T-5.0的Datasheet PDF文件第2页浏览型号LM2670T-5.0的Datasheet PDF文件第3页浏览型号LM2670T-5.0的Datasheet PDF文件第4页浏览型号LM2670T-5.0的Datasheet PDF文件第5页浏览型号LM2670T-5.0的Datasheet PDF文件第6页浏览型号LM2670T-5.0的Datasheet PDF文件第7页 
August 1998  
LM2670  
SIMPLE SWITCHER® High Efficiency 3A Step-Down  
Voltage Regulator with Sync  
General Description  
The LM2670 series of regulators are monolithic integrated  
Features  
n Efficiency up to 94%  
circuits which provide all of the active functions for  
step-down (buck) switching regulator capable of driving up to  
3A loads with excellent line and load regulation characteris-  
a
n Simple and easy to design with (using off-the-shelf  
external components)  
n 150 mΩ DMOS output switch  
n 3.3V, 5V and 12V fixed output and adjustable (1.2V to  
37V ) versions  
n 50µA standby current when switched OFF  
>
tics. High efficiency ( 90%) is obtained through the use of a  
low ON-resistance DMOS power switch. The series consists  
of fixed output voltages of 3.3V, 5V and 12V and an adjust-  
able output version.  
±
n
2%maximum output tolerance over full line and load  
The SIMPLE SWITCHER concept provides for a complete  
design using a minimum number of external components.  
The switching clock frequency can be provided by an inter-  
nal fixed frequency oscillator (260KHz) or from an externally  
provided clock in the range of 280KHz to 400Khz which al-  
lows the use of physically smaller sized components. A fam-  
ily of standard inductors for use with the LM2670 are avail-  
conditions  
n Wide input voltage range: 8V to 40V  
n External Sync clock capability (280KHz to 400KHz)  
n 260 KHz fixed frequency internal oscillator  
n −40 to +125˚C operating junction temperature range  
able from several manufacturers to greatly simplify the Applications  
design process. The external Sync clock provides direct and  
>
n Simple to design, high efficiency ( 90%) step-down  
precise control of the output ripple frequency for consistent  
filtering or frequency spectrum positioning.  
switching regulators  
n Efficient system pre-regulator for linear voltage  
regulators  
n Battery chargers  
n Communications and radio equipment regulator with  
synchronized clock frequency  
The LM2670 series also has built in thermal shutdown, cur-  
rent limiting and an ON/OFF control input that can power  
down the regulator to a low 50µA quiescent current standby  
±
condition. The output voltage is guaranteed to a 2% toler-  
ance.  
Typical Application  
DS100942-3  
SIMPLE SWITCHER® is a registered trademark of National Semiconductor Corporation.  
© 1999 National Semiconductor Corporation  
DS100942  
www.national.com  
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