What's the maximum dollar amount covered by my courtesy overdraft protection for my checking account.?

How much can I overdraw using my check card and still have PNC cover it? Note that I have not signed up with them for overdraft protection by linking my checking account to another account. So I'm referring to the "Courtesy Overdraft Protection" that banks automatically enroll their customers in in order to reap overdraft fees. My checking account is only a few months old. I mention that because some banks increase the maximum overdraft coverage with the age of the account.