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LM317EMP

更新时间： 2024-11-20 22:22:43
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
25页 732K
描述
3-Terminal Adjustable Regulator

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中文翻译

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LM317EMP 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：SOT-223, 4 PINReach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.23可调性：ADJUSTABLE
标称回动电压 1：3 V最大差分输入-输出电压：40 V
最小差分输入-输出电压：3 VJESD-30 代码：R-PDSO-G3
JESD-609代码：e0长度：6.5 mm
最大电网调整率 (%/V)：0.07最大负载调整率 (%)：1.5%
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：
最大输出电流 1：1 A最大输出电压 1：37 V
最小输出电压 1：1.2 V封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOT-223
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
调节器类型：ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR座面最大高度：1.8 mm
子类别：Other Regulators表面贴装：YES
技术：BIPOLAR端子面层：Tin/Lead (Sn/Pb)
端子形式：GULL WING端子节距：2.3 mm
端子位置：DUAL处于峰值回流温度下的最长时间：40
宽度：3.56 mm

LM317EMP 数据手册

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July 2004  
LM117/LM317A/LM317  
3-Terminal Adjustable Regulator  
age, supplies of several hundred volts can be regulated as  
long as the maximum input to output differential is not ex-  
ceeded, i.e., avoid short-circuiting the output.  
General Description  
The LM117 series of adjustable 3-terminal positive voltage  
regulators is capable of supplying in excess of 1.5A over a  
1.2V to 37V output range. They are exceptionally easy to  
use and require only two external resistors to set the output  
voltage. Further, both line and load regulation are better than  
standard fixed regulators. Also, the LM117 is packaged in  
standard transistor packages which are easily mounted and  
handled.  
Also, it makes an especially simple adjustable switching  
regulator, a programmable output regulator, or by connecting  
a fixed resistor between the adjustment pin and output, the  
LM117 can be used as a precision current regulator. Sup-  
plies with electronic shutdown can be achieved by clamping  
the adjustment terminal to ground which programs the out-  
put to 1.2V where most loads draw little current.  
In addition to higher performance than fixed regulators, the  
LM117 series offers full overload protection available only in  
IC’s. Included on the chip are current limit, thermal overload  
protection and safe area protection. All overload protection  
circuitry remains fully functional even if the adjustment ter-  
minal is disconnected.  
For applications requiring greater output current, see LM150  
series (3A) and LM138 series (5A) data sheets. For the  
negative complement, see LM137 series data sheet.  
Features  
n Guaranteed 1% output voltage tolerance (LM317A)  
n Guaranteed max. 0.01%/V line regulation (LM317A)  
n Guaranteed max. 0.3% load regulation (LM117)  
n Guaranteed 1.5A output current  
n Adjustable output down to 1.2V  
Normally, no capacitors are needed unless the device is  
situated more than 6 inches from the input filter capacitors in  
which case an input bypass is needed. An optional output  
capacitor can be added to improve transient response. The  
adjustment terminal can be bypassed to achieve very high  
ripple rejection ratios which are difficult to achieve with stan-  
dard 3-terminal regulators.  
n Current limit constant with temperature  
n P+ Product Enhancement tested  
n 80 dB ripple rejection  
Besides replacing fixed regulators, the LM117 is useful in a  
wide variety of other applications. Since the regulator is  
“floating” and sees only the input-to-output differential volt-  
n Output is short-circuit protected  
LM117 Series Packages  
Typical Applications  
Part Number  
Suffix  
Design  
Load  
Current  
1.5A  
1.2V–25V Adjustable Regulator  
Package  
K
H
TO-3  
TO-39  
0.5A  
1.5A  
T
TO-220  
LCC  
E
0.5A  
1.5A  
S
TO-263  
SOT-223  
TO-252  
EMP  
MDT  
1A  
0.5A  
00906301  
SOT-223 vs. D-Pak (TO-252)  
Packages  
Full output current not available at high input-output voltages  
*
Needed if device is more than 6 inches from filter capacitors.  
†
Optional — improves transient response. Output capacitors in the range  
of 1µF to 1000µF of aluminum or tantalum electrolytic are commonly used  
to provide improved output impedance and rejection of transients.  
00906354  
Scale 1:1  
© 2004 National Semiconductor Corporation  
DS009063  
www.national.com  
1234567...25

中文翻译

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LM317EMP 替代型号

型号 品牌 替代类型 描述 数据表
LM317AEMP/NOPB TI

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