ZHCSH29B April 2017 – December 2018 LP87524B-Q1 , LP87524J-Q1 , LP87524P-Q1
PRODUCTION DATA.
The LP87524B/J/P-Q1 device monitors the input voltage from the VANA pin in standby and active operation modes. If the input voltage rises above VANAOVP voltage level, all the regulators are disabled, pulldown resistors discharge the output voltages (if EN_RDISx = 1 in BUCKx_CTRL1 register), GPIOs that are configured to outputs are set to logic low level, nINT signal is pulled low, INT_OVP bit (in INT_TOP1 register) is set to 1, and BUCKx_STAT bits (in BUCK_x_STAT register) are set to 0. The host processor clears the interrupt by writing 1 to the INT_OVP bit. If the input voltage is above the overvoltage detection level the interrupt is not cleared. The host can read the status of the overvoltage from the OVP_STAT bit (in TOP_STAT register). Regulators cannot be enabled as long as the input voltage is above overvoltage detection level or the overvoltage interrupt is pending.