ZHCSL40N November 2004 – June 2024 TLVH431 , TLVH431A , TLVH431B , TLVH432 , TLVH432A , TLVH432B
PRODUCTION DATA
TLVH431 requires an input resistance in this application to source the reference current (IREF) needed from this device to be in the proper operating regions while turning on. The actual voltage seen at the ref pin is VREF = VIN – IREF × RIN. Because IREF can be as high as 0.5μA, TI recommends to use a resistance small enough that mitigates the error that IREF creates from VIN.