These requirements are garbage. You can't have 3V out with 3V in using TL341 with a pass transistor.I did see other thread post #16
Supply voltage: 3Vdc to 12Vdc
Output voltage: 3Vdc to 7Vdc. Output voltage not exceeding supply voltage of course. So if its 4vdc supply voltage then ouput voltage 3vdc to 4vdc. If supply is 3bdc then output voltage is 3vdc. If supply voltage is 7vdc then output voltage 3vdc to 7vdc. Etc etc
Output current: 100mA to 7A. The output current should not exceed output voltage. Meaning if vout is 3V max output is 3A. 4V out then output is 4A. 7V max output is 7A. Etc etc