SFFSAM5 June 2025 TPS7B4260-Q1

4 Pin Failure Mode Analysis (Pin FMA)

This section provides a failure modes analysis (pin FMA) for the pins of the TPS7B4260-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 supply (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.

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 FMA in this section:

Device operates at free-air temperatures between –40°C and 150°C.
The ADJ/EN pin is driven from an external source.
Device operates at an input voltage of at least 3.3V and no more than 40V.
Device operates according to all recommended operating conditions, and the absolute maximum ratings in the data sheet for the device are not exceeded.