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Help designing a power supply

Posted by brandon_lewis
2:10 pm
07/03/2025

I need to create a power supply that will accept 12V DC and output 5V DC All devices to be through hole. I have a 811-2195-5-ND which is a 3.3V supply and so I’d need the same thing in 5V if I use it. However, it’s pretty pricey as I need to create 10 of these.

I have a commercial board that uses a JQ6500 board and provides the wanted specs. I wonder if I can duplicate it for my purposes. It uses a bridge rectifier to protect against reverse connections on the 12V side. Next, it uses a LT7806CV for a regulator.

That’s it for the commercial board. Is there a good reason to use other components for my application?

Umesh Lokhande#0000

March 7, 2025 at 2:10 pm
Hi @techielew there are some DC-DC Linear regulator modules out there. These are compact through-hole modules, which use TI chips (TPS5632X (*TPS56321). [Product Link](https://www.tindie.com/products/makerpals/dc-dc-ldo-5v/#specs)
```
This DC-DC Module(LDO) with a TO-220 form factor. And designer claims that It is designed to replace existing Linear regulators in use, like LM7805, etc, and is pin-to-pin compatible.
```
## Specifications
* Compact size: 16mm x 13mm
– Input Voltage: up to 15V DC
– Output Voltage: 5V
– Continuous Current: 1.2A for 5V
– Peak Current: 3A
– Protections: O/P short circuit(hiccup)/Thermal
## Here TWO reasons to use this Module
* The main advantage of using this LDO is to reduce the heat generated in the Linear Regulator
– reduce the size of the design as now you will not need to put a separate heatsink on your board.
– Price Approx. $1.28/Unit

I hope this information will be useful to you

Best wishes!
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