5.5.1 Thermal Warning and Protection

Thermal Shutdown protection will immediately terminate power delivery on all channels when the die temperature exceeds the upper Thermal Shutdown threshold. At the same time, nRSTO will be asserted low. If the corresponding masking bit is cleared, nINTO will also be asserted low.

After the die temperature has decreased below the lower Thermal Shutdown threshold (hysteresis = 20°C) and an additional 100 ms delay, the MCP16503 will automatically attempt a new start-up sequence, without the need of an external start condition (e.g. from PWRHLD).

Thermal Warning does not invoke any automatic action. If the die temperature exceeds the Thermal Warning upper threshold, and if the corresponding masking bit is cleared, it will only generate assertion (low) of the nINTO output. The host MPU can then interrogate the MCP16503 for diagnostic purposes.