How can we get more current than MAX16813 can usually provide (but we need the part features) ?

Answer:
The MAX16813 has 4 outputs each capable of 150mA.

As these are current managed outputs, it is possible to directly connect the 4 outputs together to produce a 600mA driver; increasing the factor its drive current capabilities.
See the schematic here below:
Tags: power management 000099701 MAX16813