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TPS53355: TPS53355 LS-RDS(on) to calculate OCP

Part Number: TPS53355

Dear Sir:

The TPS53355 datasheet page.6 Low-side MOSFET on-resistance is 2m ohm,

Equation 10 on page 24 determines the RDS value 1.5m or 1.7 m ohm according to the output current.

If the output current is 25A, which rds(on) must I use to calculate OCP protection?