According to Engineering, the IDE interfaces in the PowerBook 150, Macintosh 630-series, and Power Macintosh 5200/75 LC use a built-in driver that works with volume up to 2 GB in size. However, it's important to note that any IDE drive that is going to be used on these systems must support Logical Block Addressing (LBA). LBA is the method that drive manufacturers have adopted in order to go beyond the 520 MB DOS-BIOS limit.
As long as the IDE drives support Logical Block Addressing, it should be possible to install drives larger than 500 MB in these systems.