Question: Is there a specific amount a landlord can raise your rent? When the lease expires? Can they raise it to aas much as they want before you sign a new lease? Are you only protected during your leasing period?
While you are protected under the terms of your lease agreement from rent increases (that is assuming that the rent increases are not written into your lease agreement -- they usually aren't) you are not protected against rent increases when your lease expires, unless it is specifically written into your prior lease.
For more information about Landlord and Tenant responsibilities, read Arizona's Landlord Tenant Act on the Arizona Secretary of State's website.