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LM2673S-3.3 PDF预览

LM2673S-3.3

更新时间： 2024-11-16 12:09:43
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德州仪器 - TI 稳压器
页数 文件大小 规格书
35页 1431K
描述
LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current

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LM2673S-3.3 技术参数

生命周期：Not Recommended零件包装代码：D2PAK
包装说明：TO-263,针数：4
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：7.41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-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
最大输出电压：37 V最小输出电压：1.23 V
封装主体材料：PLASTIC/EPOXY封装代码：TO-263
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表面贴装：YES
切换器配置：BUCK最大切换频率：260 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：NOT SPECIFIED
宽度：8.64 mmBase Number Matches：1

LM2673S-3.3 数据手册

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LM2673  
www.ti.com  
SNVS030N –APRIL 2000–REVISED APRIL 2013  
®
LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current  
Limit  
Check for Samples: LM2673  
1
FEATURES  
DESCRIPTION  
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. 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.  
23  
•
Efficiency Up to 94%  
•
Simple and Easy to Design with (Using Off-  
The-Shelf External Components)  
•
Resistor Programmable Peak Current Limit  
Over a Range of 2A to 5A  
•
•
150 mΩ DMOS Output Switch  
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  
•
±2% Maximum Output Tolerance Over Full  
Line and Load Conditions  
components.  
A
high fixed frequency oscillator  
•
•
•
•
Wide Input Voltage Range: 8V to 40V  
260 KHz Fixed Frequency Internal Oscillator  
Softstart Capability  
(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.  
−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 ensured to a ±2% tolerance. The clock  
frequency is controlled to within a ±11% tolerance.  
APPLICATIONS  
•
•
•
Simple to Design, High Efficiency (>90%) Step-  
Down Switching Regulators  
Efficient System Pre-Regulator for Linear  
Voltage Regulators  
Battery Chargers  
Typical Application  
Feedback  
0.01 mF  
Input  
Voltage  
V
IN  
Boost  
Output  
LM2673 - 5.0  
L
8V to 40V  
Voltage  
0.47 mF  
+
+
Switch  
Output  
C
IN  
2 x 15 mF/50V  
5V/3A  
33 mH  
+
Softstart  
8.2k  
Ground  
C
OUT  
Current  
Limit  
Adjust  
SR305  
180 mF/16V  
1 nF  
37,125  
I
=
CL  
R
ADJ  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
SIMPLE SWITCHER, Switchers Made Simple are registered trademarks of Texas Instruments.  
All other trademarks are the property of their respective owners.  
2
3
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2000–2013, Texas Instruments Incorporated  
1234567...35

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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/NOPB TI

完全替代

 具有可调节电流限制功能的 8V 至 40V、3A SIMPLE SWITCHER® 降压转
LM2673S-3.3 NSC

功能相似

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