The maximum current rating of the TPS2553DRVR is 2.5A, but it can be limited by the thermal performance of the PCB and the ambient temperature.
To ensure proper thermal management, ensure a good thermal connection between the device and the PCB, use a heat sink if necessary, and keep the ambient temperature within the recommended range.
The EN (enable) pin is used to turn the device on and off. To use it, connect the EN pin to a logic-level signal (e.g., from a microcontroller) to enable or disable the device.
To configure the output voltage, use the FB (feedback) pin and an external resistor divider network to set the desired output voltage. The datasheet provides a formula to calculate the required resistor values.
The PG pin is an open-drain output that indicates when the output voltage is within regulation. Use it to monitor the output voltage and take action if it falls out of regulation.