ZHCSFB9B June 2016 – March 2019 TPS63070
PRODUCTION DATA.
When the input voltage drops, the undervoltage lockout prevents mis-operation by switching off the device. The converter starts operation when the input voltage exceeds the threshold by a hysteresis of typically 850 mV. This relatively large hysteresis is needed to allow operation down to 2-V of supply voltage for the case when the output voltage is up at 3-V or above but restrict start-up for the case when the output voltage is zero. For start-up when the output voltage has not yet ramped, the rising UVLO threshold was set to a level that allows to start TPS63070 at a supply voltage where the load does not demand much load current.