LMG1020: Using Gate Resistor in LMG1020

Hi Hitesh,

thanks for reaching out and welcome to e2e!
LMG1020 can be used with 0ohm or without gate resistors. The gate resistors are to help with internal power consumption and are also used to reduce ringing seen at the gate, as long as the junction temperature and output/gate is kept within spec you can use 0ohm gate resistors. A ferrite bead on the gate can be used, having greater than 2 ohms will reduce the stress as well as the speed of the gate for a given load and frequency.

If you require faster switching times you can reduce the ferrite resistance value at the ring frequency. To make sure you what resistance you require and at what frequency is done with empirical testing by measuring the ring frequency and by walking down resistor values that provide a good ring to speed relationship.

you can also follow this app note that walks you through the process.
www.ti.com/.../slla385.pdf

does this help answer your question?
thanks,

Hi Hitesh,

the input capacitance is low as well as the switching frequency and should not cause any dissipation issues.
For your ferrite bead, its good to reduce the area between the LMG1020 output pins and the EPC gate so a smaller size resistor is recommended and it might suffice to use a regular resistor instead.

thanks,