Simple circuit generates +3.3V at 1A from -5V
![DC to DC Buck Converter [Adjustable, 97% Efficient, 3A] - Technology - PCBway](https://pcbwayfile.s3-us-west-2.amazonaws.com/web/19/10/28/1138298566787t.jpg "DC to DC Buck Converter [Adjustable, 97% Efficient, 3A] - Technology - PCBway")
DC to DC Buck Converter [Adjustable, 97% Efficient, 3A] - Technology - PCBway
5V, 12V Buck Converter Circuit SMPS 220V - Homemade Circuit Projects
![Mini DC/DC Step-Down (Buck) Converter - 5V @ 1A output [TSR12450] : ID 1065 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/1065-03.jpg "Mini DC/DC Step-Down (Buck) Converter - 5V @ 1A output [TSR12450] : ID 1065 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits")
Mini DC/DC Step-Down (Buck) Converter - 5V @ 1A output [TSR12450] : ID 1065 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
switch mode power supply - 5V/2A Fixed Output Buck Boost Converter Design - Electrical Engineering Stack Exchange
![DC to DC Buck Converter [Adjustable, 97% Efficient, 3A] - Technology - PCBway](https://pcbwayfile.s3-us-west-2.amazonaws.com/web/19/10/28/1132491215162t.jpg "DC to DC Buck Converter [Adjustable, 97% Efficient, 3A] - Technology - PCBway")
DC to DC Buck Converter [Adjustable, 97% Efficient, 3A] - Technology - PCBway
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