Author Topic: Screwed up pfet SOT-23 design. Swapped Source and Drain  (Read 901 times)

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Offline RibsterTopic starter

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Screwed up pfet SOT-23 design. Swapped Source and Drain
« on: December 20, 2019, 09:54:48 pm »
Hey everybody.
So what the title describes. I've swapped pin 2 and 3 of a SOT-23 pFET.
Respinning my boards would be a bit of a shame and wastefull.
I'm looking at some P MOSFETs that are like this: 1- GATE, 2 - DRAIN, 3 - SOURCE.
I've really screwed the pooch, since i now see that every one of them is DRAIN on pin 3...  :palm:

Suggestions ?
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Design and manufacturing of embedded hard- and software
 

Offline T3sl4co1l

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Re: Screwed up pfet SOT-23 design. Swapped Source and Drain
« Reply #1 on: December 20, 2019, 10:47:54 pm »
If you have just a few, turn over the part and bend the leads down.  It'll be cocked at an angle.

An N-FET wouldn't short out the path, but you'd have to figure out some way to invert (and most likely boost) the gate voltage, which will be a tall order in most circuits.

Tim
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Offline Someone

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Re: Screwed up pfet SOT-23 design. Swapped Source and Drain
« Reply #2 on: December 21, 2019, 12:06:05 am »
Depends on how your pads are arranged/shaped, a different package (SC-70 for example) might fit as is.
 

Offline RibsterTopic starter

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Re: Screwed up pfet SOT-23 design. Swapped Source and Drain
« Reply #3 on: December 21, 2019, 07:34:59 am »
If you have just a few, turn over the part and bend the leads down.  It'll be cocked at an angle.

An N-FET wouldn't short out the path, but you'd have to figure out some way to invert (and most likely boost) the gate voltage, which will be a tall order in most circuits.

Tim

I did just that and my design works as intended.
I just made 12 boards, and i want them to be ready for a client.

Depends on how your pads are arranged/shaped, a different package (SC-70 for example) might fit as is.

Thanks! I’ll have a look for SC-70 pinouts
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Design and manufacturing of embedded hard- and software
 


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