ICL

Current (A)

Current Limit

tRETRY

INOM

ICL_LINPK

Time (s)

ICL_ENPS

Thermal Shutdown

Figure 8-7. Soft Short-Circuit Behavior

In all of these cases, the internal thermal shutdown is safe to hit repetitively. There is no device risk or lifetime

reliability concerns from repeatedly hitting this thermal shutdown level.

8.3.3.2.1 VS During Short-to-Ground

When VOUT is shorted to ground, the module power supply (VS) can see a transient decrease. This decrease is

caused by the sudden increase in current flowing through the cable inductance. For ideal system behavior, TI

recommends that the module supply capacitance be increased by adding bulk capacitance on the power supply

node.

8.3.3.3 Thermal Shutdown Behavior

Figure 8-8 shows the thermal shutdown behavior when LATCH pin is high. As shown, the switch clamps the

current until it hits thermal shutdown, and then the device will remain latched off until the EN or LATCH pin

toggles. Although the device is configured in latched condition, there is an internal tRETRY period. ST pin will

remain low and output will remain OFF even when EN or LATCH toggled within the tRETRY period.

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TPS274C65CP

SLVSH35A – OCTOBER 2023 – REVISED FEBRUARY 2024

Copyright © 2024 Texas Instruments Incorporated

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