The maximum current rating of the TPS2553DRVT is 2.5A, but it can be limited by the thermal performance of the PCB and the ambient temperature.
To ensure proper power-on and power-off, the EN pin should be driven high to turn on the device, and driven low to turn it off. The EN pin should be driven slowly (typically 1-10ms) to prevent inrush currents.
The FLT pin is an open-drain output that indicates an overcurrent or overtemperature fault. It can be connected to a microcontroller or other logic circuit to detect faults and take corrective action.
The sense resistor value should be chosen based on the desired overcurrent threshold. A smaller sense resistor value will trigger the overcurrent protection at a lower current, while a larger value will trigger it at a higher current.
The TPS2553DRVT is rated for operation up to 125°C, but the maximum junction temperature should be derated based on the ambient temperature and the thermal performance of the PCB.
TPS2553DRVT datasheet
by Texas Instruments
