The ADN8831 can generate high current which depends on the external MOSFETs selected (4-5A or so) however the maximum voltage on The ADN8831 tops out at 5V. In order to increase the output voltage capability you need to power the external MOSFETs from a high voltage rail, for example 12V or 24V, this usually requires level translation from 5 to 12V for the drive circuit to the MOSFET.