LT8607 behavior during reversed input

 If EN/UV pin is low, or Vout is higher than regulated point, LT8607 won't switch.

LT8607 has burst mode and pulse skipping mode. Neither one will cause boosted Vin problem.

Thanks for this.  I finally got around to purchasing the LT8607 eval board and testing this condition (power applied to the output when no input voltage is present).  While I do NOT see any boosted VIN, I DO see some switching activity when the externally applied output voltage is between about 3V - 5V.  This is actually very similar to the regulator I am hoping to replace, although that other device boosts VIN, while the LT8607 does not, at least not by any significant amount.

Thanks for this.  I finally got around to purchasing the LT8607 eval board and testing this condition (power applied to the output when no input voltage is present).  While I do NOT see any boosted VIN, I DO see some switching activity when the externally applied output voltage is between about 3V - 5V.  This is actually very similar to the regulator I am hoping to replace, although that other device boosts VIN, while the LT8607 does not, at least not by any significant amount.