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Interfacing a low-side Mosfet on a 3,3V DSP

Question asked by PDES on May 14, 2012
Latest reply on May 17, 2012 by FEB

Hi all,

 

I need to interface a low side mosfet on a DSP, powered at 3,3V.

The maximum switching frequency in not so high (300Hz) and the duty cycle can vary between 10:90%.

The source/sync current available from the DSP is sufficient to turn-on/off the mosfet but, even using a logic level mosfet, the VGS is not so high (3,3V only).

In this case is it preferrable to use a simple level translator buffer, or a low side driver, like the ADP3630, could be better ?

The ADP3630 has a maximum current of 2A while I need only few hundreds of uA. Could I use something else ?

 

Thanks in advance

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