There are dedicated "MOSFET driver" IC's available (ICL7667, Max622/626, TD340, IXD*404).
Some also control IGBTs. What is the practical purpose of these? Is it all about maximizing the switching speed (driving gate capacitance) or are there other motives?
Electronic – the purpose of “MOSFET driver” IC’s
drivermosfetswitches
Related Solutions
Using Andy's and some other people's suggestion here is the solution that I've come up with
The pro of this approach is the simplicity, but the cons are that the driving speed is limited and the power consumed when the PMOS is ON.
Edit: More clarification: OutConn- can be any source voltage (Vcc). PGate2 is the connection to the PMOS gate to switch it. After actually testing this circuit, i can say that for a power MOSFET with gate capacitance of about 3000pF the switching frequency that can be achieved can be maximum of about 1kHz. If anyone knows how to achieve higher frequency, please let me know.
What is wrong with your circuit is irrelevant from the point of view of getting a working unit.
There is no need for a MOSFET driver in this case. Use the IRLML2502 MOSFET and drive its gate directly from the digital output of the microcontroller. Check the IRLML2502 datasheet and you will see that it has a maximum guaranteed on resistance of only 45 mΩ with 4.5 V on the gate. You also don't need a resistor in series with the gate:
Yes, it really is that simple.
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Best Answer
A MOSFET driver IC (like the ICL7667 you mentioned) translates TTL Or CMOS logical signals, to a higher voltage and higher current, with the goal of rapidly and completely switching the gate of a MOSFET.
An output pin of a microcontroller is usually adequate to drive a small-signal logic level MOSFET, like a 2N7000. However, two issues occur when driving larger MOSFETs:
Finally, many MOSFET drivers are designed explicitly for the purpose of controlling a motor with an H-bridge.