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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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S1313 датащи(PDF) 21 Page - Seiko Instruments Inc |
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S1313 датащи(HTML) 21 Page - Seiko Instruments Inc |
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21 / 56 page  SUPER LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.2.1_00 S-1313 Series 21 4. Discharge shunt function (S-1313 Series A / B type) The S-1313 Series A / B type has a built-in discharge shunt circuit to discharge the output capacitance. The output capacitance is discharged as follows so that the VOUT pin reaches the VSS level. (1) The ON / OFF pin is set to OFF level. (2) The output transistor is turned off. (3) The discharge shunt circuit is turned on. (4) The output capacitor discharges. Since the S-1313 Series C / D type does not have a discharge shunt circuit, the VOUT pin is set to VSS level through several M Ω internal divided resistors between the VOUT pin and the VSS pin. The S-1313 Series A / B type allows the VOUT pin to reach the VSS level rapidly due to the discharge shunt circuit. Output transistor: OFF ON / OFF Pin: OFF VIN ON / OFF VSS ON / OFF circuit Discharge shunt circuit : ON VOUT *1 *1. Parasitic diode Current flow GND *1 S-1313 Series Output capacitor (CL) Figure 20 5. Constant current source pull-down (S-1313 Series A / C type) The ON / OFF pin is internally pulled down to the VSS pin in the floating status, so the VOUT pin is set to the VSS level. Note that the IC's current consumption increases as much as current flows into the constant current of 0.1 μA typ. when the ON / OFF pin is connected to the VIN pin and the S-1313 Series A / C type is operating. |
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