8.3.4 Fault Reporting (NFAULT)

NFAULT is driven low if either a current fault condition is detected, die temperature has exceeded T(WRN) or

supply has dropped below the UVLO threshold. NFAULT returns to high-impedance as soon as all three fault

conditions clear.

T >TWRN

Normal

Operation

CUR_OK = Z

Driver = ON

LDO = ON

CUR_OK = L

Driver = OFF

LDO= ON

CUR_OK = Z

TMP_OK = L

Driver= EN/EN*

LDO= ON

Thermal

Shutdown

CUR_OK = Z

TMP_OK = L

Driver = OFF

LDO = ON

Current

Fault Recovery

CUR_OK = L

Driver = ON for tsc

LDO= ON

Out at IO(LIM) and T < TWRN

EN*

T >

TW

RN

T <

TW

RN

&

EN

EN

*

Thermal

Warning

Current

Fault

Output at Hi-Z

CUR_OK=Z

Driver = OFF

LDO = ON

NFAULT = [CUR_OK && PWR_OK && TMP_OK]

Figure 8-3. Device State Diagram

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SLLSFL4A – FEBRUARY 2022 – REVISED DECEMBER 2022

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