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LM3940IT-3.3 PDF预览

LM3940IT-3.3

更新时间： 2024-11-22 12:02:11
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
18页 1864K
描述
LM3940 1A Low Dropout Regulator for 5V to 3.3V Conversion

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LM3940IT-3.3 技术参数

生命周期：Not Recommended零件包装代码：SFM
包装说明：TO-220, SIP3,.1TB针数：3
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：7.49可调性：FIXED
最大回动电压 1：1 V标称回动电压 1：0.31 V
最大绝对输入电压：7.5 V最大输入电压：5.5 V
最小输入电压：4.5 VJESD-30 代码：R-PSFM-T3
JESD-609代码：e0长度：14.986 mm
最大电网调整率：0.04%最大负载调整率：0.08%
湿度敏感等级：1功能数量：1
输出次数：1端子数量：3
工作温度TJ-Max：125 °C工作温度TJ-Min：-40 °C
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流 1：1 A最大输出电压 1：3.47 V
最小输出电压 1：3.13 V标称输出电压 1：3.3 V
封装主体材料：PLASTIC/EPOXY封装代码：TO-220
封装等效代码：SIP3,.1TB封装形状：RECTANGULAR
封装形式：FLANGE MOUNT包装方法：TUBE
峰值回流温度（摄氏度）：NOT APPLICABLE认证状态：Not Qualified
调节器类型：FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR座面最大高度：4.7 mm
子类别：Other Regulators表面贴装：NO
技术：BIPOLAR端子面层：Tin/Lead (Sn/Pb)
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：SINGLE处于峰值回流温度下的最长时间：NOT APPLICABLE
最大电压容差：5.2%宽度：10.16 mm
Base Number Matches：1

LM3940IT-3.3 数据手册

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LM3940  
www.ti.com  
SNVS114E –MAY 1999–REVISED MARCH 2013  
LM3940 1A Low Dropout Regulator for 5V to 3.3V Conversion  
Check for Samples: LM3940  
1
FEATURES  
APPLICATIONS  
2
•
•
•
•
•
•
Output voltage specified over temperature  
Excellent load regulation  
•
•
Laptop/Desktop Computers  
Logic Systems  
Specified 1A output current  
Requires only one external component  
Built-in protection against excess temperature  
Short circuit protected  
DESCRIPTION  
The LM3940 is a 1A low dropout regulator designed to provide 3.3V from a 5V supply.  
The LM3940 is ideally suited for systems which contain both 5V and 3.3V logic, with prime power provided from  
a 5V bus.  
Because the LM3940 is a true low dropout regulator, it can hold its 3.3V output in regulation with input voltages  
as low as 4.5V.  
The TO-220 package of the LM3940 means that in most applications the full 1A of load current can be delivered  
without using an additional heatsink.  
The surface mount DDPAK/TO-263 package uses minimum board space, and gives excellent power dissipation  
capability when soldered to a copper plane on the PC board.  
TYPICAL APPLICATION  
*Required if regulator is located more than 1″ from the power supply filter capacitor or if battery power is used.  
**See APPLICATION HINTS.  
CONNECTION DIAGRAM  
Figure 1. 3-Lead TO-220 Package  
(Front View)  
Figure 2. 3-Lead DDPAK/TO-263 Package  
(Front View)  
Drawing Number NDE00EB  
Drawing Number KTT003B  
Figure 3. 3-Lead SOT-223  
(Front View)  
Drawing Number DCY (R-PDSO-G4)  
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.  
All trademarks are the property of their respective owners.  
2
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 © 1999–2013, Texas Instruments Incorporated  
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LM3940IT-3.3 替代型号

型号 品牌 替代类型 描述 数据表
LMS1587CT-3.3/NOPB TI

类似代替

 3A、13V 线性稳压器 | NDE | 3 | 0 to 125
LM3940IT-3.3/NOPB TI

类似代替

 LM3940 1A Low Dropout Regulator for 5V to 3.3V Conversion
UCC283T-3 TI

类似代替

 LOW-DROPOUT 3-A LINEAR REGULATOR FAMILY

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