SNVSCW3 November 2024 LM644A2-Q1
PRODUCTION DATA
In some cases, the user can need an input undervoltage lockout (UVLO) level different than that provided internal to the device. This need can be accomplished by using the circuit shown in Figure 7-2. The input voltage at which the device turns on is designated VON while the turn-off voltage is VOFF. First, a value for RENB is chosen in the range of 10kΩ to 100kΩ, then Equation 1 is used to calculate RENT and VOFF.