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LM78

更新时间: 2024-01-22 08:29:45
品牌 Logo 应用领域
德州仪器 - TI 三端稳压器
页数 文件大小 规格书
28页 3020K
描述
LM340-N/LM78XX Series 3-Terminal Positive Regulators

LM78 技术参数

生命周期:Obsolete包装说明:,
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.67
JESD-30 代码:R-PSFM-T4功能数量:1
端子数量:4最大输出电流 1:0.5 A
最大输出电压 1:30 V最小输出电压 1:5 V
封装主体材料:PLASTIC/EPOXY封装形状:RECTANGULAR
封装形式:FLANGE MOUNT认证状态:Not Qualified
调节器类型:ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR表面贴装:NO
技术:BIPOLAR端子形式:THROUGH-HOLE
端子位置:SINGLEBase Number Matches:1

LM78 数据手册

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LM340-N, LM78xx  
www.ti.com  
SNOSBT0I FEBRUARY 2000REVISED MARCH 2013  
LM340-N/LM78XX Series 3-Terminal Positive Regulators  
Check for Samples: LM340-N, LM78xx  
1
FEATURES  
DESCRIPTION  
The LM140/LM340A/LM340-N/LM78XXC monolithic  
3-terminal positive voltage regulators employ internal  
current-limiting, thermal shutdown and safe-area  
compensation, making them essentially indestructible.  
If adequate heat sinking is provided, they can deliver  
over 1.0A output current. They are intended as fixed  
voltage regulators in a wide range of applications  
including local (on-card) regulation for elimination of  
noise and distribution problems associated with  
single-point regulation. In addition to use as fixed  
voltage regulators, these devices can be used with  
external components to obtain adjustable output  
voltages and currents.  
2
Complete Specifications at 1A Load  
Output Voltage Tolerances of ±2% at Tj = 25°C  
and ±4% Over the Temperature Range  
(LM340A)  
Line Regulation of 0.01% of VOUT/V of ΔVIN at  
1A Load (LM340A)  
Load Regulation of 0.3% of VOUT/A (LM340A)  
Internal Thermal Overload Protection  
Internal Short-circuit Current Limit  
Output Transistor Safe Area Protection  
P+ Product Enhancement Tested  
Considerable effort was expended to make the entire  
series of regulators easy to use and minimize the  
number of external components. It is not necessary to  
bypass the output, although this does improve  
transient response. Input bypassing is needed only if  
the regulator is located far from the filter capacitor of  
the power supply.  
The 5V, 12V, and 15V regulator options are available  
in the steel TO-3 power package. The  
LM340A/LM340-N/LM78XXC series is available in the  
TO-220 plastic power package, and the LM340-N-5.0  
is available in the SOT-223 package, as well as the  
LM340-5.0 and LM340-12 in the surface-mount  
DDPAK/TO-263 package.  
Typical Applications  
*Required if the regulator is located far from the power supply filter.  
**Although no output capacitor is needed for stability, it does help  
transient response. (If needed, use 0.1 μF, ceramic disc).  
VOUT = 5V + (5V/R1 + IQ) R2 5V/R1 > 3 IQ,  
load regulation (Lr) [(R1 + R2)/R1] (Lr of LM340-5).  
Figure 1. Fixed Output Regulator  
Figure 2. Adjustable Output Regulator  
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 © 2000–2013, Texas Instruments Incorporated  

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