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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CS51313 датащи(PDF) 19 Page - Cherry Semiconductor Corporation |
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CS51313 датащи(HTML) 19 Page - Cherry Semiconductor Corporation |
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19 / 20 page  6) Keep the inductor switching node small by placing the output inductor, switching and synchronous FETs close together. 7) The MOSFET gate traces to the IC must be as short, straight, and wide as possible. 8) Use fewer, but larger output capacitors, keep the capaci- tors clustered, and use multiple layer traces with heavy copper to keep the parasitic resistance low. 9) Place the switching MOSFET as close to the +5V input capacitors as possible. 10) Place the output capacitors as close to the load as possible. 11) Place the VFB,VOUT filter resistors (510Ω) in series with the VFB and VOUT pins as close as possible to the pins. 12) Place the COFF and COMP capacitors as close as possi- ble to the COFF and COMP pins. 13) Place the current limit filter capacitor between the VFB and VOUT pins, as close as possible to the pins. 14) Connect the filter components of the following pins: VFB, VOUT, COFF, and COMP to the Gnd pin with a single trace, and connect this local Gnd trace to the output capaci- tor Gnd. 15) The “Droop” Resistor (embedded PCB trace) has to be wide enough to carry the full load current. 16) Place the VCC bypass capacitor as close as possible to the IC. Application Information: continued 19 |
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