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BQ25618: BQ25618

Part Number: BQ25618

In my application the use of this IC is designed such that the target has both a USB supply and a battery supply

The battery is in the following scenario assumed to be either fully charged or at least within the required voltage level for this IC at any time.

I want to know if the voltage level at the PMID output of this IC exposes a supply voltage glitch / dip when the USB is either connected or disconnected and if so: what is the duration of this glitch/dip

If it may have any impact: the target either has a current draw of 50mA or 200mA depending on the actual momentary target operating state.

The concern of this, is if the USB supply change-over results in a system reset of the target i.e.the  MCU, because of the MCU supply interruption, when the main USB supply is interrupted

Thank you

  • When USB is connected, PMID voltage is VBUS - 0.7V, this dip glitch time is about 220ms.

    When USB is disconnected, there is glitch on PMID. PMID voltage dips from VBUS (USB voltage) to VBAT-0.7V for 40ms before Boost voltage powers up (assuming Boost is enabled when USB is disconnected).