The TPS63020 has one more unique feature with the Smart Power Good Pin. If the TPS63020 enters dynamic current limit mode, the Power Good pin goes low. This way the load is notified of a potential unregulated output voltage. This notification happens at a much earlier stage than with a traditional power good signal which goes low only when the output voltage of the converter falls below 95% of the nominal value. This extra lapse of time would allow the system to react in a safe way, giving time to have a safe storage of data before shut down or reduce processor activity to reduce the load. If the overload condition is only sporadic and goes away, the battery voltage recovers and the TPS63020 goes back into normal operating mode; the input current is no longer limited and the ‘Smart’ Power Good goes high again. The die temperature is also monitored during operation. If junction temperature goes above a critical level, the Power Good signal will go low. The device will then enter dynamic input current mode reducing the current through the device. If the temperature rises over the maximum value specified, the device will go into over temperature protection and shut down; it will restart when the temperature goes back to a normal operating level.