The LM5067 is a hotswap controller which is used to manage inrush current and protect in case of faults.

When designing a hotswap, three key scenarios should be considered:

• Start-up

• Output of a hotswap is shorted to ground when the hotswap is on. This is often referred to as a hot-short.

• Powering-up a board when the output and ground are shorted. This is usually called a start-into-short.

All of these scenarios place a lot of stress on the hotswap MOSFET and need special care when designing the hotswap circuit to keep the MOSFET within its SOA. A detailed design example is provided in the following sections and similar procedure can be followed for a custom design with different system target specifications. Alternatively, a spreadsheet design tool LM5067 Design Calculator is available for simplified calculations..