4 Pin Failure Mode Analysis (Pin FMA)

This section provides a Failure Mode Analysis (FMA) for the pins of the REF4132-Q1. The failure modes covered in this document include the typical pin-by-pin failure scenarios:

• Pin short-circuited to Ground (see Table 4-2)
• Pin open-circuited (see Table 4-3)
• Pin short-circuited to an adjacent pin (see Table 4-4)
• Pin short-circuited to VIN (see Table 4-5)

Table 4-2 through Table 4-5 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 4-1.

Figure 4-1 shows the REF4132-Q1 pin diagram. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the REF4132-Q1 data sheet.

Figure 4-1 DBV Package5-Pin SOT-23Top View

Following are the assumptions of use and the device configuration assumed for the pin FMA in this section:

• Unless otherwise specified, the voltage applied to the VIN pin is within the REF4132-Q1 Recommended Operating Range.
• Device functionality indicates that the REF4132-Q1 output voltage is regulated
• Layout used for this analysis is given by Figure 4-2

Figure 4-2 Layout Example