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LM2673S-3.3 PDF预览

LM2673S-3.3

更新时间： 2024-09-28 22:22:03
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
26页 447K
描述
SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit

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LM2673S-3.3 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：TO-263, 7 PINReach 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：40 V最小输入电压：8 V
标称输入电压：12 VJESD-30 代码：R-PSSO-G7
JESD-609代码：e0长度：10.16 mm
湿度敏感等级：3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-263
封装等效代码：SMSIP7H,.55,50TB封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：235
认证状态：Not Qualified座面最大高度：4.79 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：280 kHz
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：SINGLE处于峰值回流温度下的最长时间：30
宽度：8.64 mmBase Number Matches：1

LM2673S-3.3 数据手册

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October 2003  
LM2673  
SIMPLE SWITCHER® 3A Step-Down Voltage Regulator  
with Adjustable Current Limit  
General Description  
Features  
n Efficiency up to 94%  
The LM2673 series of regulators are monolithic integrated  
circuits which provide all of the active functions for a step-  
down (buck) switching regulator capable of driving up to 3A  
loads with excellent line and load regulation characteristics.  
n Simple and easy to design with (using off-the-shelf  
external components)  
n
Resistor programmable peak current limit over a range  
of 2A to 5A.  
>
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 adjustable  
output version.  
n 150 mΩ DMOS output switch  
n 3.3V, 5V and 12V fixed output and adjustable (1.2V to  
37V ) versions  
The SIMPLE SWITCHER concept provides for a complete  
design using a minimum number of external components. A  
high fixed frequency oscillator (260KHz) allows the use of  
physically smaller sized components. A family of standard  
inductors for use with the LM2673 are available from several  
manufacturers to greatly simplify the design process.  
n
2%maximum output tolerance over full line and load  
conditions  
n Wide input voltage range: 8V to 40V  
n 260 KHz fixed frequency internal oscillator  
n Softstart capability  
n −40 to +125˚C operating junction temperature range  
Other features include the ability to reduce the input surge  
current at power-ON by adding a softstart timing capacitor to  
gradually turn on the regulator. The LM2673 series also has  
built in thermal shutdown and resistor programmable current  
limit of the power MOSFET switch to protect the device and  
load circuitry under fault conditions. The output voltage is  
guaranteed to a 2% tolerance. The clock frequency is  
controlled to within a 11% tolerance.  
Applications  
>
n Simple to design, high efficiency ( 90%) step-down  
switching regulators  
n Efficient system pre-regulator for linear voltage  
regulators  
n Battery chargers  
Typical Application  
10091303  
SIMPLE SWITCHER® is a registered trademark of National Semiconductor Corporation.  
© 2003 National Semiconductor Corporation  
DS100913  
www.national.com  
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LM2673S-3.3 替代型号

型号 品牌 替代类型 描述 数据表
LM2673S-3.3 TI

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