The input capacitor is the low-impedance energy source for the converters which helps provide stable operation. A low-ESR multilayer ceramic capacitor is recommended for best filtering and must be placed between VIN and GND as close as possible to those pins. For most applications, a minimum effective input capacitance of 3 µF should be present, though a larger value reduces input current ripple.
The architecture of the 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, TI recommends using X7R or X5R dielectrics. Considering the DC-bias derating the capacitance, the minimum effective output capacitance is 10 µF for TPS62824x, TPS62825x, TPS62826x and TPS62827A and 20 µF for TPS62827.
A feed forward capacitor is required for the adjustable version, as described in Section 220.127.116.11. This capacitor is not required for the fixed output voltage versions.