SNVSCR4 July 2024 TLA431
ADVANCE INFORMATION
Slow or inaccurate responses can also occur when the reference pin is not provided enough overdrive voltage. This is the amount of voltage that is higher than the internal virtual reference. The more overdrive voltage provided, the faster the TLA431 response.
For applications where TLA431 is being used as a comparator, good design practice is to set the trip point to greater than the positive expected error (i.e. +1.0% for the A version). For fast response, setting the trip point to >10% of the internal VREF can suffice.
For minimal voltage drop or difference from Vin to the ref pin, use an input resistor <10kΩ to provide Iref.