External component selection

UM0613

4/11

Doc ID 15186 Rev 1

2

External component selection

2.1

Input and output capacitor selection

The use of ceramic capacitors with low ESR as input and output capacitors is

recommended. It is also recommended to use 4.7 µF / 6.3 V as a minimum value for the

input and output capacitors and 1 µF / 6.3 V as the optimal value for the reference capacitor,

in order to achieve good device stability.

Note:

See recommended components in Table 2.

2.2

Inductor selection

In order to fully benefit from the compact solution offered by the STOD02, a very thin

inductor with a low DC series winding resistance is recommended for this application.

The maximum current of the inductor must be taken into consideration in order to avoid

saturation of the core. The STOD02 automatically limits the maximum current in the inductor

to 0.9 A for the step-up stage and 1.1 A for the inverting stage.

Suggested inductance values are in the range between 4.7 µH and 6.8 µH.

Note:

See recommended components in Table 2.