9.2.2.5 Output Capacitor Selection

The output voltage range of TPS6282x is 0.6V to 4V. While stability is a first criteria for the output filter selection (L and C_OUT), the output capacitor value also determines transient response behavior and ripple of V_OUT. The recommended typical value for the output capacitor is 2x10µF (or 1x 22µF) and can be small ceramic capacitors with low equivalent series resistance (ESR). For lower V_OUT (V_OUT ≤ 2V) and where only moderate load transients are present, 10µF can be sufficient. In either case a minimum effective output capacitance of 5µF should be present.

To keep low resistance and to get a narrow capacitance variation with temperature, it is recommended to use X7R or X5R dielectric. Using an even higher value has advantages like smaller voltage ripple and tighter output voltage accuracy in PSM.