The architecture of the TPS6281xM device allows the use of tiny ceramic output capacitors with low equivalent series resistance (ESR). These capacitors provide low output voltage ripple and are recommended. To keep its low resistance up to high frequencies and to get narrow capacitance variation with temperature, it is recommended to use dielectric X7R, X7T, or an equivalent. Using a higher value has advantages like smaller voltage ripple and tighter DC output accuracy in power save mode. By changing the device compensation with a resistor from COMP/FSET to GND, the device can be compensated in three steps based on the minimum capacitance used on the output. The maximum capacitance is 470 μF in any of the compensation settings.

The minimum capacitance required on the output depends on the compensation setting as well as on the current rating of the device. The TPS62810M and TPS62813M devices require a minimum output capacitance of 27 μF while the lower current versions (the TPS62812M and TPS62811M devices) require 15 μF at minimum. The required output capacitance also changes with the output voltage.

For output voltages below 1 V, the minimum increases linearly from 32 μF at 1 V to 53 μF at 0.6 V for the TPS62810M device. Use the TPS62813M device with the compensation setting for smallest output capacitance. Other compensation ranges and ranges for TPS62811M and TPS62812M are equivalent. See Table 9-1 and Table 9-2 for details.