MPM3840 - Max Capacitance (Capacitive Load) on Output

We need to replace the TPS82085 in an existing design, because of availability. We have up to 170uF capacitance on some of these rails, which the TPS82085 can handle without problem.

Our load is distributed across the board and is all X5R and X7R ceramics.

How much load capacitance can the MPM3840 suppoort? I can’t find anything in the datasheet other than the typical 22uF recommended on the output.

Thanks

Hello bill.d,

I will get back to you as soon as possible.

The Advantages of Constant-On-Time Control in DC/DC Converters article is a good resource for why too many low esr ceramics capacitors is not good for COT devices.

Regards,
Vinh Tran

Hello bill.d,

Just updating the forum post for clarity.
From internal testing, the device was able to work up to 200uF with no issues.

Regards,
Vinh Tran