DLPS029F April 2013 – May 2019 DLPC350
It is difficult to set up a power monitor to trip exactly on the DLPC350 controller minimum supply voltages specifications. Thus, TI recommends that the external power monitor generating POSENSE target its threshold to 90% of the minimum supply voltages and ensure that POSENSE remain low for a sufficient amount of time to allow all supply voltages to reach minimum controller requirements and stabilize. Note that the trip voltage for detecting the loss of power is not critical for POSENSE and thus may be as low as 50% of rated supply voltages. In addition, the reaction time to respond to a low voltage condition is not critical for POSENSE. INIT_DONE has much more critical requirements in these areas.