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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MMPF0100 датащи(PDF) 128 Page - Freescale Semiconductor, Inc |
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MMPF0100 датащи(HTML) 128 Page - Freescale Semiconductor, Inc |
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128 / 136 page  Analog Integrated Circuit Device Data 128 Freescale Semiconductor PF0100 Typical Applications PF0100 Layout Guidelines 8.2.5 Switching Regulator Layout Recommendations 1. Per design, the switching regulators in PF0100 are designed to operate with only one input bulk capacitor. However, it is recommended to add a high frequency filter input capacitor (CIN_hf), to filter out any noise at the regulator input. This capacitor should be in the range of 100 nF and should be placed right next to or under the IC, closest to the IC pins. 2. Make high-current ripple traces low-inductance (short, high W/L ratio). 3. Make high-current traces wide or copper islands. 4. Make high-current traces symetrical for dual–phase regulators (SW1, SW3). Diver Controller SWxIN SWxLX SWxFB COUT CIN L SWx VIN Compensation CIN_HF Figure 30. Generic Buck Regulator Architecture SWxIN Inductor CIN COUT CIN_HF SWxLX GND SWxFB Figure 31. Recommended Layout for Buck Regulators |
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