Author Topic: 5V Linear Regulator  (Read 3285 times)

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Offline Private ReidTopic starter

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5V Linear Regulator
« on: June 20, 2008, 08:00:41 PM »
Enerywhere i go to buy a regulator, the person serving me askes if i would like it to be a negative or positive regulator?!

is there a difference?

which one should i buy?

5v negitive

5v positive
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Offline ALZ

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Re: 5V Linear Regulator
« Reply #1 on: June 21, 2008, 12:46:01 AM »
Hi Private Reid:  Yes there is a difference. Not to be a smart ass but I don't know what you are builting so I don't which one you need. What it means is if your ground is negative and the other power rail is positive then that's a  positive  regulator. If your ground is  positive and the other power rail negative then it's negative regulator.

Offline Afroman

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Re: 5V Linear Regulator
« Reply #2 on: June 21, 2008, 12:27:28 PM »
The vast majority of the time you want a positive 5V regulator.
For example, going from a 9.6V battery pack down to 5V to power a microcontroller will require a positive 5V regulator, such as the classic LM7805.

Negative regulators are generally only used for creating regulated negative rails for use with certain amplifier circuits.

 


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