• Complementary N-channel And P-channel Mosfet
• P Channel And N Channel Mosfet Pdf
• How Mosfet N Channel Works
• N Channel Mosfet List

Comparison of N Channel and P Channel MOSFETs

• The P-channel enhancement MOSFETs were very popular, because it was much easier and cheaper to produce than the N channel device.
  But now a days these difficulties have overcome and mass production of N-channel MOSFETs becomes easier.
  Thus the N-MOSFETS have replaced PMOSs and P-MOSFETs have almost become obsolete.
• The hole mobility is nearly 2.5 times lower than the electron mobility.
  Thus a P channel MOSFET occupies a larger area than the N channel MOSFET having the same I_D rating.
  At normal fields, in silicon,
  the hole mobility is 500 cm^2/v.sec
  the electron mobility is 1300 cm²/v.sec.
  Therefore the P-channel ON resistance will be twice that of n-channel MOSFET ON resistance.

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1. ON resistance means the resistance of the device when I_D is maximum for a given V_DS. Its value depends upon μ of carriers.
2. P-channel device have holes as majority carriers.
3. N-channel device have electrons as majority carriers.

Complementary N-channel And P-channel Mosfet

Alibaba.com offers 22,952 n channel mosfet products. A wide variety of n channel mosfet options are available to you, such as brand name, type. Texas Instruments PMOS switches are p-channel enhancement-mode MOSFETs that are optimized for 3-V or 5-V power distribution in battery-powered systems.

• At the same values of I_D and V_DS, if the ON resistance of P channel device were to be reduced/make equal to that of N-channel device, then the P-channel device must have more than twice the are of N-channel device. Thus the n -channel devices will be smaller is size.
  In other words the packing density of N-channel devices is more (R = ρ. l/ A)
• N channel MOSFETs are fast switching devices. The operating speed is limited by RC time constant of the device. The capacitance is proportional to the junction cross sections.
• The N channel MOSFETs are TTL compatible. As the applied gate voltage and drain supply are positive for an n-channel enhancement MOSFET.
• The drain resistance of P channel MOSFET is 3 times higher than that for an identical N-channel MOSFET.
• The N-Channel MOSFET has the higher packing density which makes it faster in switching applications due to the smaller junction areas and lower inherent capacitance.
• The N-channel MOSFET is smaller for the same complexity than P-channel device.
• Due to the positively charged contaminants, the N-channel MOSFET may turn ON prematurely, whereas the P-channel device will not be affected.

The summary of Difference Between N Channel and P Channel MOSFETs are listed in the following table.

P Channel And N Channel Mosfet Pdf

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