A good PCB layout for the TPS2350D involves placing the device close to the power source, using a solid ground plane, and keeping the input and output traces short and wide to minimize inductance and resistance. Additionally, it's recommended to use a common ground point for the input and output returns.
The input capacitor should be chosen based on the input voltage ripple requirement and the desired output voltage regulation. A general rule of thumb is to use a capacitor with a value of 10uF to 22uF, with a voltage rating of at least 1.5 times the maximum input voltage. X5R or X7R ceramic capacitors are recommended due to their low ESR and high reliability.
The maximum output current capability of the TPS2350D is 3.5A, but it's recommended to derate the output current based on the ambient temperature and the input voltage. The device can deliver up to 3.5A of output current at room temperature with a 5V input voltage, but the output current should be reduced to 2.5A at 85°C ambient temperature.
The TPS2350D has a built-in overcurrent protection feature that can be enabled by connecting a resistor between the OCSET pin and the output voltage. The value of the resistor determines the overcurrent threshold, and the device will limit the output current to the set value during an overcurrent event.
The TPS2350D is rated for operation up to 125°C junction temperature, but the device's performance and reliability may degrade at high temperatures. It's recommended to derate the output current and input voltage at high temperatures to ensure reliable operation. Additionally, the device should be mounted on a heat sink or a thermally conductive PCB to dissipate heat effectively.
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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.
