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LTC7001 output higher than input

Category: Datasheet/Specs
Product Number: LTC7001

Hi all,

im currently working on an high power switch for a battery powered device. The switch itself is made out of an NMOS with the LTC7001 as an high side driver.

No im facing the question if charging would be possible through this switch even if the LTC7001 is not supplied and the NMOS is turned off.

My first thought was that it would be fine because the body diode of the MOS would let the current flow back to the battery.

However am uncertain if the LTC7001 would survive such a procedure because the TS Pin would be driven by a voltage and the internal charge pump is not working because VCC is not supplied.

So my first question is if the LTC7001 could be used in this setting and if the current can flow through the TS pin to the bootstrap pin so that the maximum voltage rating of -0.3V from TS to BST is not exceeded?

My second question: If the LTC7001 should not be used in that way, is there an alternative to achieve this, like placing a Schottky Diode from TS to BST to limit the negative voltage difference between those pins?

best regards,

Peter