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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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LM2575EP 数据表(PDF) 10 Page - National Semiconductor (TI) |
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LM2575EP 数据表(HTML) 10 Page - National Semiconductor (TI) |
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10 / 26 page  Typical Performance Characteristics (Circuit of Figure 2) (Continued) Feedback Pin Current Maximum Power Dissipation (TO-263) (See (Note 14)) 20113205 20113228 Switching Waveforms Load Transient Response 20113206 VOUT =5V A: Output Pin Voltage, 10V/div B: Output Pin Current, 1A/div C: Inductor Current, 0.5A/div D: Output Ripple Voltage, 20 mV/div, AC-Coupled Horizontal Time Base: 5 µs/div 20113207 Test Circuit and Layout Guidelines As in any switching regulator, layout is very important. Rap- idly switching currents associated with wiring inductance generate voltage transients which can cause problems. For minimal inductance and ground loops, the length of the leads indicated by heavy lines should be kept as short as possible. Single-point grounding (as indicated) or ground plane con- struction should be used for best results. When using the Adjustable version, physically locate the programming resis- tors near the regulator, to keep the sensitive feedback wiring short. www.national.com 10 |
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