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Author Topic: 5amp negative adjustable voltage regulator needed  (Read 12956 times)

mostrander

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  • Posts: 17
5amp negative adjustable voltage regulator needed
« on: August 03, 2008, 05:38:37 PM »
Hey guys I need some help finding a part for a power supply I?m building. The part is a 5amp negative adjustable voltage regulator -1.2v to -32v. I have found a 3 amp part# lm333 but I need a 5 amp, any suggestions?
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insane4evr

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Re: 5amp negative adjustable voltage regulator needed
« Reply #1 on: August 03, 2008, 06:30:45 PM »
You can connect several of them in parallel. Look at the datasheet from National Semiconductor (page 5).
Since this regulator is the linear family, you will need massive heatsink at high output current and high input-output differential voltage.
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khabe

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  • Posts: 525
Re: 5amp negative adjustable voltage regulator needed
« Reply #2 on: August 03, 2008, 08:20:07 PM »
Quote from: insane4evr on August 03, 2008, 06:30:45 PM
You can connect several of them in parallel. Look at the datasheet from National Semiconductor (page 5).
Since this regulator is the linear family, you will need massive heatsink at high output current and high input-output differential voltage.
Same opinion from my side,
I use parallel switch mode regulators often enough,
khabe
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gyulasun

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Re: 5amp negative adjustable voltage regulator needed
« Reply #3 on: August 04, 2008, 12:26:20 AM »
Quote from: mostrander on August 03, 2008, 05:38:37 PM
Hey guys I need some help finding a part for a power supply I?m building. The part is a 5amp negative adjustable voltage regulator -1.2v to -32v. I have found a 3 amp part# lm333 but I need a 5 amp, any suggestions?

Hi,

The LM333 data sheet includes three LM333 devices in parallel to get 9A output current from -1.2V to -27V....   Is it not  enough good for you?

http://www.national.com/ds/LM/LM333.pdf
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mostrander

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Re: 5amp negative adjustable voltage regulator needed
« Reply #4 on: August 04, 2008, 12:47:03 AM »
Thanks guys that should work.
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mostrander

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Re: 5amp negative adjustable voltage regulator needed
« Reply #5 on: August 04, 2008, 03:39:51 AM »
Will the lm350 and LM333 I added to this work?
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