Perhaps a new product? This area seems to be a gap in product offerings on the market.
I'm looking for a way to eFuse a relatively low voltage negative supply: -3.3V. All of the eFuse options that I see on the market are appropriate for high side switching a positive supply, or for a systems that could use a hot swap controller. However the circumstances are different when trying to break a connection on a negative supply such that the load potential reaches ground after a short circuit event and the fuse breaks the load connection.
The eFuse parts would I think in theory operate, but you'd be left with a negative potential still resident on the circuit, relative to anything else on the board - with no current flow. This happens since the eFuse utilizes a pFET which would break the ground connection, instead of the supply line.
One distinct advantage of the eFuse is the size. My application requires a very small footprint for the circuit.
Are there any parts that would fit this application? App notes would also be helpful.
Thanks.
