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TPS40425: BP5 for power stage

Part Number: TPS40425

Hello TI,

In my design I am using TPS40425 and the power stage is CSD95372A.

The design spec is: 

12V input, 0.85V output @50A dual phase operation.

The power stage CSD95372A needs 5V for VDD (gate drive), I would like to know whether can I use TPS40425 internal 5V LDO (BP5) to supply 5V to CSD95372A?

Thanks in advance.

Regards,

Srinivas

  • I do not recommend powering the power stages from BP5. BP5 is used for sensitive analog circuits in the controller, and the power stage gate drivers will add a lot of switching noise on to it. It is better to use an independent +5V supply.