Suggestion for Power MOSFET

[cks3976]

Hi,

I am designing a power switch, which will be turned On/Off by a Microcontroller (if needed through an Optocoupler). Requirements of the switch are as below:

1. Input Voltage (VGS) : 12V
2. Maximum Load Current : 12 Ampere.

I am planning to use the drain of the MOSFET as the initial voltage feed to a series of POL (point of load) non-isolated converters, such as 3V3, 1V5 etc.,

Now my questions are:
1. Whether this is a practical approach ?
2. What special cares are to be taken (in schematics and Layout) with this Power FET ? , and
3. Please suggest me any MOSFET with above above specs which any of you might have used in past.

Thanks in Advance,
CKS

 

[milind.a.kulkarni]

I had used IRF3205 avaliable on INR28 and FQP55N10 INR22 .....

Both will serve you rating I think....

Good Luck

 

[Mehrshad74]

I love IRF1404 although its 40V. RDS=4mohm and can be easily drive directly by micro.