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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ADP5600ACPZ-R7 датащи(PDF) 22 Page - Analog Devices |
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ADP5600ACPZ-R7 датащи(HTML) 22 Page - Analog Devices |
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22 / 25 page  ADP5600 Data Sheet Rev. 0 | Page 22 of 25 If LDO is the only load of CPOUT and it has not reached its dropout region then the LDO can be represented by a constant current source and the effective circuit at the charge pump output is shown in Figure 62. Figure 62. Simplified Circuit of the Output upon Removal of External Clock on SYNC The effective circuit is similar to a simple discharging of a capacitor using a current source, ICPOUT. This drop can be estimated using the following equation: VSYNCOFF = (ICPOUT × tSYNCOFF)/CCPOUT where: VSYNCOFF is the drop from the initial CPOUT voltage. tSYNCOFF is 189.63 µs (typical). ICPOUT is the total current being pulled out of the CCPOUT capacitor. CCPOUT is the effective capacitance at CPOUT, this includes tolerance, dc bias effect, and temperature coefficient. VCPOUT CCPOUT + ICPOUT |
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