AN3050

STBP120 highlights

Doc ID 16207 Rev 1

9/18

Overvoltage protection is especially necessary in order to avoid damage in the event of

inadvertently connecting an illegal power supply (with higher than specified voltage) to the

application. In this case, the OVP device must block the excessive input voltage even during

its own power-up period. As illustrated on Figure 4, STBP120 correctly performs this task. In

addition, it provides the status information to the microcontroller as soon as the input voltage

exceeds the 1.2 V.

Figure 4.

Startup into overvoltage condition

Input voltage

Output voltage

FLT output voltage