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L7809CV-DG 参数 Datasheet PDF下载

L7809CV-DG图片预览
型号: L7809CV-DG
PDF下载: 下载PDF文件 查看货源
内容描述: [Positive voltage regulator ICs]
分类和应用: 线性稳压器IC调节器电源电路输出元件局域网
文件页数/大小: 57 页 / 2150 K
品牌: STMICROELECTRONICS [ ST ]
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Application information  
L78xx, L78xxC, L78xxAB, L78xxAC  
Figure 28. Protection against input short-circuit with high capacitance loads  
Note:  
Application with high capacitance loads and an output voltage greater than 6 volts need an  
external diode (see Figure 23 on page 34) to protect the device against input short circuit. In  
this case the input voltage falls rapidly while the output voltage decrease slowly. The  
capacitance discharges by means of the base-emitter junction of the series pass transistor  
in the regulator. If the energy is sufficiently high, the transistor may be destroyed. The  
external diode by-passes the current from the IC to ground.  
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DocID2143 Rev 31  
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