8.2.2.2 Input and Output Capacitors

The TPSM842xx devices require both input and output capacitance for proper operation. The minimum required input capacitance for all of the TPSM842xx devices is 10 µF of ceramic capacitance placed directly at the device pins. The minimum required output capacitance for the TPSM84203 and TPSM84205 is 2× 47 µF of ceramic type. The TPSM84212 requires only one 47 µF ceramic output capacitor. Additional capacitance can be added to improve ripple or transient response.

For this application, the minimum required input capacitance of 10 µF, ceramic was added and 2× 47 µF ceramic capacitance was added to the output.