Hello support team,
Please tell me about the operation when BOOT UVLO is detected. (VBOOT-SW drops to 2.5V)
What if the VIN is low and VBOOT-SW does not recover to 2.7V?
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When Boot UVLO is detected the controller shuts of HO drive high side MOSFET.
After multiple failures of turning on highside, the device should turn on lowside for a short time for boot recharge.
Note at low-VIN and low-VCC, the boot capacitor will instantly drain charge from VCC capacitor, so the VCC voltage can drop quickly when recharging the boot capacitor.
A boot refresh at low VIN might drain VCC cap to VCC UVLO.