ZHCSCO8E June 2014 – May 2019 TPS65283 , TPS65283-1
PRODUCTION DATA.
The power switch in TPS65283, TPS65283-1 incorporates one N-channel power MOSFETs for lower resistance and the bulk of the MOSFET is connected to ground to prevent the reverse current flowing back the input through body diode of MOSFET when power switch is off.
When power switch is enabled, the reverse-voltage protection feature turns off the N-channel MOSFET whenever the output voltage exceeds the input voltage by 55 mV (typical) for 4-ms (typical). This prevents damage to devices on the input side of the TPS65283, TPS65283-1 by preventing significant current from sinking into the input capacitance of power switch or buck output capacitance. The TPS65283, TPS65283-1 device keeps the power switch turned off even if the reverse-voltage condition is removed and does not allow the N-channel MOSFET to turn on until power is cycled or the device enable is toggled. The reverse-voltage comparator also asserts the nFAULT output (active-low) after 4 ms.