AN2504 - Application note

Output MOSFET protection

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8

Output MOSFET protection

For applications requiring higher current drive capabilities an external MOSFET might be

used, which protect the output of a voltage detector from overloading and destroying. It is

possible to use either N channel or P channel transistor (see below).

8.1

External N-channel transistor

If the load should be connected to the supply voltage during the regular operation (output,

OUT, is not asserted), an external N-channel transistor will be needed (see Figure 11).

signal, OUT, is asserted, the external N-channel MOSFET is switched off and disconnects

the load from the ground.

Figure 11.

Circuit with external N-channel transistor

AI12913

RLOAD

VCC

VCC

R

VCC

STM1061N

OUT

VSS