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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCP19035-AAAAE/MF датащи(PDF) 26 Page - Microchip Technology |
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MCP19035-AAAAE/MF датащи(HTML) 26 Page - Microchip Technology |
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26 / 44 page  MCP19035 DS22326B-page 26 2012-2013 Microchip Technology Inc. 5.3 Operation with Low Input Voltages If the application requires an input voltage below 5.5V, it is recommended to use the alternative schematic depicted in Figure 5-4. FIGURE 5-4: Typical Application for Low VIN. This connection avoids the voltage drop on the internal voltage regulator, ensuring the correct driving of the MOSFETs at low input voltage. Additional care must be exercised when this alternative schematic is used to minimize the input voltage ripple/noise. The internal circuitry of the MCP19035 may be affected by the ripple/noise present on the VCC pin. The RIN resistor together with CVCC capacitor form a low-pass filter for the bias voltage (VCC voltage). The recommended value range for this resistor is between 2.2 and 10. CIN COUT L Q1 Q2 MCP19035 HDRV LDRV PHASE BOOT +VCC CBOOT CVCC +VOUT SHDN VIN PWRGD COMP FB R1 R3 C1 R2 C3 R4 C2 +VIN ON OFF RIN GND |
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