ZHCSMB6E March 2010 – October 2020 TPS62065 , TPS62067
PRODUCTION DATA
The TPS6206x has an internal soft start circuit that controls the ramp up of the output voltage. Once the converter is enabled and the input voltage is above the undervoltage lockout threshold VUVLO the output voltage ramps up from 5% to 95% of its nominal value within tRamp of typically 250 μs.
This limits the inrush current in the converter during start-up and prevents possible input voltage drops when a battery or high impedance power source is used.
During soft start, the switch current limit is reduced to 1/3 of its nominal value ILIMF until the output voltage reaches 1/3 of its nominal value. Once the output voltage trips this threshold, the device operates with its nominal current limit ILIMF.