MCP73833 and status to RaspberryPi
Simply add 4.7~10k pull-ups to 3.3V for STAT pins and use voltage divider on PG pin, with 1.2k resistor to 5V and 2k resistor to ground.

UPDATE

Your comment made me think of what is really going on inside that chip with PG pin. I still believe that voltage divider should work, but in case it will disrupt the functioning of the MCP somehow, you can leave the pull-up resistor only and add a buffer between output and RPi, something like NL17SH17

UPDATE 2

MOSFET or JFET can be used instead of buffer. Here are some examples, inverting and non-inverting.