Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general high-frequency layout guidelines, such as keeping the input and output traces short and away from each other, using a solid ground plane, and minimizing vias and layer changes.
The input capacitor should be chosen based on the input voltage range, ripple current, and ESR requirements. A general rule of thumb is to choose a capacitor with a capacitance value of at least 10uF and a voltage rating of at least 1.5 times the maximum input voltage. Additionally, the capacitor should have a low ESR to minimize voltage ripple.
The maximum output current of the TPS23525PWT is 2.5A, but this can be limited by the thermal performance of the device and the PCB. It's essential to ensure that the device is properly heatsinked and that the PCB is designed to handle the maximum output current.
The TPS23525PWT has a built-in overcurrent protection feature that can be enabled by connecting the OC pin to the VIN pin. This will limit the output current to a maximum of 3.5A. Additionally, an external current sense resistor can be used to monitor the output current and implement custom overcurrent protection.
The EN pin is an active-high enable input that allows the device to be turned on and off. When the EN pin is high, the device is enabled, and when it's low, the device is disabled. This pin can be used to implement power sequencing or to turn off the device when it's not in use.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
