Switch Mode 3 terminal regulator (7805) replacement

VK3ZYZ

Moderator
Staff member
These regs have dropped greatly in price. We used to pay +$20 each for something like this, now they are less than $2, for a 5V 1A reg with max 32V input. They come in various voltages too.
A good way to save power and heat.
SwithModeReg1.jpg

They are pretty small!
SwithModeReg2.jpg

No heat sink needed either.
It will be interesting to see how noisy they are.
 

VK3ZYZ

Moderator
Staff member
It uses an HX1314G reg. Here is the data sheet and a better picture.
I note the data sheet says 8 to 30V input.
IMAG0545.JPG

The output voltage can be changed by adjusting the resistors on pin 1.
The resistor marked "03C" is 10.5K.

1727237139597.png
 

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