4 Pin Failure Modes and Effects Analysis (Pin FMEA)

This section provides a failure modes and effects analysis (pin FMEA) for the pins of the TPS7B4253-Q1. The failure modes covered in this document include the typical pin-by-pin failure scenarios:

• Pin short-circuited to ground (see Table 4-6 and Table 4-6)
• Pin open-circuited (see Table 4-7 and Table 4-7)
• Pin short-circuited to an adjacent pin (see Table 4-8 and Table 4-8)
• Pin short-circuited to V_IN (see Table 4-9 and Table 4-9)
• Pin short-circuited to car battery voltage (see and )

Table 4-9 through Table 4-9 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 4-1.

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

• Device operates at free-air temperatures between –40°C and 150°C.
• The ADJ and EN pins are driven from external sources.
• Device operates at an input voltage of at least 4V and no more than 40V.
• Device operates according to all recommended operating conditions and the absolute maximum ratings in the device data sheet are not exceeded.