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"Open/close" or "down" function make regulators in charged cases to open or closed. Although in "off" or "down" mode, the supply current because output voltage stabilizer disabled and dropped to a low level, but internal offset circuit is still in operation. When revived after, regulators will open again than the input voltage under the condition of closed much faster speed of the output voltage regulator, again. If shown in "open" state, the regulators will be logical high-level startup. Otherwise, will be logical low-level startup.

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