MOSFET P Channel

Discussion in 'General Electronics Chat' started by BULL04, May 21, 2014.

  1. BULL04

    Thread Starter New Member

    Jun 16, 2010
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    Hello

    I am looking for P channel MOSFET,100-150mA.
    I want to use it as a switch (attached a picture):
    Gate - from Microcontroller(3.3V)
    Sourese- 3.3V power_in
    Dreain - 3.3V power out.

    Please recommended to me about part number to use ( package = sot 23 )

    Thanks
     
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
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  3. BULL04

    Thread Starter New Member

    Jun 16, 2010
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    Ok,

    The Continuous Drain Currentis 2.2A, I am looking for Continuous Drain Current=150mA.
    I am using this switch to supply a power to RS485 part.
     
  4. Jony130

    AAC Fanatic!

    Feb 17, 2009
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    But what wrong is with 2.2A ?
     
  5. alfacliff

    Well-Known Member

    Dec 13, 2013
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    the maximum power is no problem as long as its higher than what is necessary, the circuit will not get more power from a higher rated mosfet, the current is dertermined by the load.
     
  6. BULL04

    Thread Starter New Member

    Jun 16, 2010
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  7. Jony130

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    Feb 17, 2009
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    Yes you can can use it.
    Also don't forget to add pull-up resistor between source and gate.
     
  8. BULL04

    Thread Starter New Member

    Jun 16, 2010
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    Do you mean to put resistor 4.7K between source and gate?
     
  9. Jony130

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    Feb 17, 2009
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    Yep, and 10K also do the job.
     
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