SLVA745A December 2015 – April 2025 TPS7B4253-Q1

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.

Table 4-1 TI Classification of Failure Effects

Class	Failure Effects
A	Potential device damage that affects functionality.
B	No device damage, but loss of functionality.
C	No device damage, but performance degradation.
D	No device damage, no impact to functionality or performance.

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.