I am trying to develop a schematic with minimal components. The board would drive a N-MOSFET from a microcontroller, and I am wondering if I can omit the gate resistors (pulldown for "default" off, series from microcontroller to gate).
The transistor is essentially charging a capacitor whose charge will be used to provide high current for a very short time (20mA at 3V for 15ms to downstream).
The rationale behind omitting the gate resistors is the following:
- 4.7kOhm current limiting resistor (VCC from a 3V coin cell, limit high current which reduces coin cell life). This would mean low drain current.
- Transistor very close to microcontroller, expected low parasitic noise.
My question is: would this design work?