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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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L7983 Fiches technique(PDF) 17 Page - STMicroelectronics |
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L7983 Fiches technique(HTML) 17 Page - STMicroelectronics |
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17 / 43 page  5.4 Enable and Reset In order to maximize both the EN threshold accuracy and the current consumption, the device implements two different enable thresholds: • The wake-up threshold, VWAKEUPH = 0.5 V typ. • The start-up threshold, VENH = 1.2 V typ. As soon as the EN pin is detected above VWAKEUPH and VIN voltage is higher than VINH, the regulator turns on the internal circuitry and waits for the VENH before starting the switching activity. When this occurs, the internal voltage reference is increased by about 2 ms (typ.) in order to limit the inrush current and perform a smooth output capacitor charge. Figure 14. Turn-on example L7983 Enable and Reset DS13354 - Rev 1 page 17/43 |
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