The external components have to fulfill the needs of the application, but also the stability criteria of the device's control loop. The TPS6215xA-Q1 is optimized to work within a range of external components. The LC output filter's inductance and capacitance must be considered together, creating a double pole, responsible for the corner frequency of the converter (see Output Filter And Loop Stability). Table 3 can be used to simplify the output filter component selection.
The TPS6215xA-Q1 can be run with an inductor as low as 1µH. FSW should be set Low in this case. However, for applications running with the low frequency setting (FSW=High) or with low input voltages, 2.2µH is recommended.
More detailed information on further LC combinations can be found in SLVA463.