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LM309H/NOPB PDF预览

LM309H/NOPB

更新时间: 2024-02-27 03:22:32
品牌 Logo 应用领域
美国国家半导体 - NSC 输出元件调节器
页数 文件大小 规格书
9页 280K
描述
IC VREG 5.05 V FIXED POSITIVE REGULATOR, MBCY3, ROHS COMPLIANT, METAL CAN, TO-39, 3 PIN, Fixed Positive Single Output Standard Regulator

LM309H/NOPB 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:TO-39
包装说明:TO-39, CAN3/4,.2针数:3
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01Factory Lead Time:1 week
风险等级:0.67可调性:FIXED
标称回动电压 1:1.95 V最大绝对输入电压:35 V
最大输入电压:35 V最小输入电压:7.1 V
JESD-30 代码:O-MBCY-W3长度:8.255 mm
最大电网调整率:0.05%最大负载调整率:0.05%
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:
最高工作温度:125 °C最低工作温度:
最大输出电流 1:1 A最大输出电压 1:5 V
最小输出电压 1:5 V标称输出电压 1:5.05 V
封装主体材料:METAL封装代码:TO-39
封装等效代码:CAN3/4,.2封装形状:ROUND
封装形式:CYLINDRICAL峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified调节器类型:FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR
子类别:Other Regulators表面贴装:NO
技术:BIPOLAR端子形式:WIRE
端子节距:4.699 mm端子位置:BOTTOM
处于峰值回流温度下的最长时间:NOT SPECIFIED最大电压容差:5%
宽度:8.255 mmBase Number Matches:1

LM309H/NOPB 数据手册

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5. Preventing latchoff for loads connected to negative  
Application Hints  
1. Bypass the input of the LM109 to ground with 0.2 µF  
ceramic or solid tantalum capacitor if main filter capaci-  
tor is more than 4 inches away.  
voltage:  
If the output of the LM109 is pulled negative by a high cur-  
rent supply so that the output pin is more than 0.5V negative  
with respect to the ground pin, the LM109 can latch off. This  
can be prevented by clamping the ground pin to the output  
pin with a germanium or Schottky diode as shown. A silicon  
diode (1N4001) at the output is also needed to keep the  
positive output from being pulled too far negative. The 10Ω  
resistor will raise +VOUT by 0.05V.  
2. Avoid insertion of regulator into “live” socket if input  
voltage is greater than 10V. The output will rise to within  
2V of the unregulated input if the ground pin does not  
make contact, possibly damaging the load. The LM109  
may also be damaged if a large output capacitor is  
charged up, then discharged through the internal clamp  
zener when the ground pin makes contact.  
3. The output clamp zener is designed to absorb tran-  
sients only. It will not clamp the output effectively if a fail-  
ure occurs in the internal power transistor structure. Ze-  
ner dynamic impedance is  
4. Continuous RMS  
current into the zener should not exceed 0.5A.  
4. Paralleling of LM109s for higher output current is not  
recommended. Current sharing will be almost nonexist-  
ent, leading to a current limit mode operation for devices  
with the highest initial output voltage. The current limit  
devices may also heat up to the thermal shutdown point  
(175˚C). Long term reliability cannot be guaranteed  
under these conditions.  
DS007138-7  
Crowbar Overvoltage Protection  
Input Crowbar  
Output Crowbar  
DS007138-8  
DS007138-9  
*Zener is internal to LM109.  
*
*
Q1 must be able to withstand 7A continuous current if fusing is not used  
at regulator input. LM109 bond wires will fuse at currents above 7A.  
Q2 is selected for surge capability. Consideration must be given to filter  
capacitor size, transformer impedance, and fuse blowing time.  
††  
Trip point is 7.5V.  
Typical Performance Characteristics  
Maximum Average  
Power Dissipation (LM109K)  
Maximum Average  
Power Dissipation (LM309K)  
Output Impedance  
DS007138-18  
DS007138-16  
DS007138-17  
3
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