ATL431: ATL431 disable

Part Number: ATL431

Hello support team,

In ATL431 datasheet Fig4, when VKA=VREF=0V, is IKA current same as Ioff :0.05uA?  If VREF is pulled low, can ATL431 be disable with very low current?

Customer would like to investigate ATL431 as over voltage cramp circuit, however, they need very low Iq (<1uA) during normal operation without over voltage.

Thanks,

Koji Ikeda