Texas Instruments provides a recommended PCB layout in the TPS62270DRVR evaluation module documentation, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize noise.
The selection of the inductor depends on the output voltage, output current, and switching frequency. TI recommends using an inductor with a high saturation current, low DC resistance, and a suitable inductance value. The datasheet provides a list of recommended inductors, and TI's WEBENCH tool can also be used to select an inductor.
The TPS62270DRVR has an absolute maximum input voltage rating of 6.5V, but the recommended maximum input voltage is 5.5V to ensure reliable operation and prevent damage to the device.
The TPS62270DRVR has a built-in overcurrent protection feature that can be enabled by connecting a resistor from the OC pin to GND. The value of the resistor determines the overcurrent threshold. TI provides a calculation formula in the datasheet to determine the resistor value based on the desired overcurrent threshold.
The TPS62270DRVR is rated for operation up to 125°C, but the device's performance and reliability may be affected at high temperatures. TI recommends derating the output current and voltage at high temperatures to ensure reliable operation. The datasheet provides thermal derating curves to help designers determine the maximum output current and voltage at different temperatures.