ZHCSG44G June 2017 – January 2025 TPS650864
PRODUCTION DATA
Figure 7-27 Emergency Shutdown SequenceWhen VSYS crosses below VSYS_UVLO_5V, all Power Good pins are deasserted, and after 444ns (nominal) of delay all VRs shut down. Upon shutdown, all internal discharge resistors are set to 100Ω to ensure timely decay of all VR outputs. Other conditions that cause emergency shutdown are the die temperature rising above the critical temperature threshold (TCRIT), deassertion of Power Good of any rail (configurable), or failure of any rail to reach power good within 10ms of being enabled (configurable). If the PMIC was shutdown by UVLO, it waits until VSYS rises above VSYS_UVLO_5V + VSYS_UVLO_5V_HYS before reloading the default OTP and checking the state of the CTLx pins. If the PMIC was shutdown by temperature, it waits until temperature drops below TCRIT – TCRIT_HYS before reloading the OTP and checking the state of the CTLx pins. If the PMIC was shutdown by power fault, it reloads the OTP after disabling all rails and check the state of the CTLx pins once the OTP has finished reloading.