| Electronics > Beginners |
| Suggestions for 5V switching regulator? |
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| jmelson:
I've used the LM2575-5.0 fixed "Simple Switcher" in a product, and have been happy with it. I use a Pulse Engineering inductor and a Schottky diode and a couple caps, and that is all. The inductor I chose might have a bit too much resistance, it starts to get just a LITTLE warm at 500 mA. Drastically cut the power consumption (and heat) from a linear regulator I used before. Jon |
| Lusu:
How about drop-in replacements for the LM78XX liniar regulators? Something like the ones from Aimtec AMSR series: https://www.tme.eu/ro/Document/fbe51557a9f709febacd30dd3ccbacd8/AMSR1-78-NZ.pdf I see they are more expensive, like around 6 bucks, but may be others much cheaper on the "Chinese stores". (Share links if you know them :) ) |
| rcbuck:
langwadt and beanflying, an update on these modules. I ordered 5 of them and they work very well. If you design your circuit board to match the input and output terminal spacing, they are easy to attach to the board. The only thing I did not like about the module is the pot that is used to set the voltage. Pots tend to have an effect on long term reliability of circuits. I took the pot off of one of the board and ran some tests. If you replace the pot with a 21K ohm, 1% resistor, you get 3.3 volts output. If you use a 37.4K ohm resistor, you get 5.2 volts output. An 0603 resistor fits perfectly across the two outside pads that the pot uses. The low side of the pot is tied to the wiper so putting the resistor across the two fixed terminal pads duplicates the pot functionality. I didn't test to see what value resistor is needed for any other voltage. |
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