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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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R6986 датащи(PDF) 15 Page - STMicroelectronics |
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R6986 датащи(HTML) 15 Page - STMicroelectronics |
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15 / 62 page  DocID026996 Rev 2 15/62 R6986 Functional description 62 Figure 3. Internal block diagram 5.1 Power supply and voltage reference The internal regulator block consists of a start-up circuit, the voltage pre-regulator that provides current to all the blocks and the bandgap voltage reference. The starter supplies the startup current when the input voltage goes high and the device is enabled (SS/INH pin over the inhibits threshold). The pre-regulator block supplies the bandgap cell and the rest of the circuitry with a regulated voltage that has a very low supply voltage noise sensitivity. Switchover feature The switchover scheme of the pre-regulator block features to derive the main contribution of the supply current for the internal circuitry from an external voltage (3 V < VBIAS < 5.5 V is typically connected to the regulated output voltage). This helps to decrease the equivalent quiescent current seen at VIN. (please refer to Section 5.6: Switchover feature on page 28). |
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