TPS7B81-Q1: load step response

Shinji Tsuji

Genius 11496 points

Part Number: TPS7B81-Q1

Hi team,

Could you give me 3.3V version of the load step response plot just as below 5V output?

regards,

10 months ago

0 Nick Butts 10 months ago

TI__Mastermind 34555 points

Hi Tsuji-san,

I took this plot a while back, which shows a 150-mA transient for a 3.3-V output. I didn't record what the COUT was, and this transient is much faster than the datasheet plot. Is this enough?

Regards,

Nick

0 Shinji Tsuji 10 months ago in reply to Nick Butts

TI__Genius 11496 points

Hi Nick-san,

Thank you.

Is it possible to measure usign known schematic? TI EVM should be fine.

regards,

0 Nick Butts 10 months ago in reply to Shinji Tsuji

TI__Mastermind 34555 points

Tsuji-san,

Yes, I will get this measurement early next week for you. I believe we have an EVM in stock in the office.

Regards,

Nick

0 Nick Butts 10 months ago in reply to Shinji Tsuji

TI__Mastermind 34555 points

Hi Tsuji-san,

I didn't realize that the EVM has a fixed 5-V device on it, so I ordered some fixed 3.3-V devices. They will be here mid- to late- next week. I'll update when we have the load transient plots to share.

Regards,

Nick

+1 Erin Thibeault 10 months ago

TI__Expert 3970 points

Hi Tsuji-san,

Here is the load transient response for 3.3V version of TPS7B81-Q1. I used a 1µF capacitor for C_in and C_out, and V_out is AC coupled.

I hope this is helpful,

Erin

Power management

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TPS7B81-Q1: load step response