I have been working with RFMD parts on and off for
over a decade. If you are small company (translate:
not a cellular phone company), you will find it
very difficult to get technical support from them.
I am using the RF2172 power amp in a design
right now and I have received zero support for the
part. Being a PA, it is tricky and touchy and moody;
all good reasons to call up the company for tips
and tricks when using it. I got nothing from RFMD.
I did, however, get a SemTech engineer who knows
the RFMD part really well to help me out.
The RF Troubleshooter