How can a converter IC protect its associated system when battery voltage drops?
Many converter ICs have undervoltage lockout (UVLO) that turns off the converter if the battery voltage drops below a specific threshold, protecting the associated equipment. Most UVLO functions exhibit a hysteresis between the voltage that activates IC and the voltage when it cuts off. For example, a converter IC may turn on if the battery voltage goes above 3.5V and turn off if the battery voltage drops below 2.7V.