What is The Under Voltage Lock Out (UVLO)?

The Under Voltage Lock Out (UVLO) function stops the internal circuits to prevent the IC from malfunctioning when the IC power supply is low.

The purpose of this product is not to stop the IC from malfunctioning, but rather is to suppress the quiescent current when the battery voltage drops, so there are also products with a built-in UVLO function.

Generally, for a switching power supply, like DC/DC, when the battery voltage drops causing the UVLO to activate, the switching operation stops. When the power supply voltage subsequently increases, the UVLO function is released, and the switching operation starts.

The detailed behavior differs depending on the product, so the data sheet of each product must be checked.