Switching power supply dual voltage
5v and 3.3v by LM2575 LM1117

Here is circuit Switching power supply dual voltage, output 5V 1A and 3.3V 1A.
Use IC LM2575 SIMPLE SWITCHER 1A Step-Down Voltage Regulator ,and IC LM1117 is 800mA Low-Dropout Linear Regulator. Volt suppy 9V - 60V
Detail more see to image circuit.