DC/DC step-down question

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sqaure
 
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DC/DC step-down question

Post by sqaure »

For my projects I normally use a 12V power supply and a UBEC DC/DC Step-Down (Buck) Converter - 5V @ 3A output to run my pi.

Unfortunately "UBEC DC/DC Step-Down (Buck) Converter - 5V @ 3A output" (https://www.adafruit.com/product/1385) is out of stock and because I need this running asap I was thinking of using the Mini DC/DC Step-Down (Buck) Converter - 5V @ 1A output (https://www.adafruit.com/product/1065).

I am not running any usb peripherals from the Pi. I am only running a 16x20 lcd screen a relay and a keypad from the gpio pins. So I don't think the lower current (3A to 1A) should be an issue. Please correct me if I am wrong.

Also why does the "Mini DC/DC Step-Down (Buck) Converter - 5V @ 1A output " have 3 pins, is one an earth?
There isn't a wiring diagram.

Thanks,
Kyle

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adafruit_support_bill
 
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Re: DC/DC step-down question

Post by adafruit_support_bill »

I am only running a 16x20 lcd screen a relay and a keypad from the gpio pins.
I don't know the current requirements of your relay, but the other components should be OK with a 1A supply.
Also why does the "Mini DC/DC Step-Down (Buck) Converter - 5V @ 1A output " have 3 pins, is one an earth?
It is a ground pin. All voltages need to be referenced to some ground.
There isn't a wiring diagram.
There is a data sheet under "Technical Details" with pinouts and sample application circuits.
http://www.adafruit.com/datasheets/tsr1.pdf

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sqaure
 
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Re: DC/DC step-down question

Post by sqaure »

The relay won't be an issue.

This is exactly what I'm looking for. Thanks.

Any idea when the other ubec will be restocked? A week, a month? I need 50 so I'm not sure if I should wait...
Thanks again.

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adafruit_support_bill
 
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Re: DC/DC step-down question

Post by adafruit_support_bill »

At this point, we don't have a firm estimate from our supplier. You can sign up for notifications and you will get an email as soon as they are back in stock. But at this point I can't give you even a tentative date.

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