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Does ADP196 support reverse current conduction?

Category: Hardware
Product Number: ADP196

ADP196 does not block reverse current like ADP198, but is it ok for it to conduct current from VOUT to VIN during normal system operation? 

The abs max table says drain current can be + or -, but also says VOUT must be less than or equal to VIN. Seems that VOUT would need to be greater than VIN for current to flow that way (maybe only by a few mV given the 10mohm on resistance).

What is the risk of the IC conducting small amounts of reverse current for long periods of time (hours for example) ? 

Thanks,

Steve

  • Steve,

    There is a diode from the Vout pins to the Vin pins that results in an uncontrolled path. If the N-Channel MOSFET is on the MOSFETs channel resistance will be in parallel with the diode.

    There is no protection for overcurrent or over temperature in the reverse direction.

    The abs max is violated if the switch is off, because Vout > Vin by a 0.7V, a diode voltage drop.

    JayBee