Ground referenced load - N-Channel mosfet switching

[VanitarNordic]

as we know if we decided to drive a load by an N Channel Mosfet, we have to connect the load to the Drain. Therefore the load would be referenced to the +Vcc.

is there any possibility/circuit design that allows us to drive a load by the N channel Mosfet(s), but the load referenced to the Ground?

[T3sl4co1l]

It's called a high side gate driver, and yes, they are plentiful.

If you need DC operation, find one with an integrated charge pump, or create an additional supply to deliver (+Vcc) + 10V or so.

If all you need is the switch, consider using a purpose-made load switch IC, which includes the driver logic, supply, power transistor, and all the protection you might desire (voltage, current and temperature).  Also check under "hot-swap controller", those have similar functionality while supporting an external transistor (that can be much bigger).

Tim

[VanitarNordic]

It's called a high side gate driver, and yes, they are plentiful.

If you need DC operation, find one with an integrated charge pump, or create an additional supply to deliver (+Vcc) + 10V or so.

If all you need is the switch, consider using a purpose-made load switch IC, which includes the driver logic, supply, power transistor, and all the protection you might desire (voltage, current and temperature).  Also check under "hot-swap controller", those have similar functionality while supporting an external transistor (that can be much bigger).

Tim

Would you please mention a circuit example or a link?

[twistedresistor]

Would you please mention a circuit example or a link?

Here is a part from Linear, which does the thing.
http://www.analog.com/en/design-center/reference-designs/circuit-collections/lt1910-fault-protected-high-side-switch.html#cc-overview

[Zero999]

What are you trying to do? If it's a lamp flasher or speed controller, then the oscillator IC itself can be bootstrapped. Here are a couple of examples using the 555 timer.

A lamp flasher


A PWM controller