TPS4811-Q1: FLTI_L & FLTT_L State During Start-Up and Acceptable Ripple on Vs

Brian Gosselin

Part Number: TPS4811-Q1

Tool/software:

Hi Team,

1. FLTI_L and FLTT_L are open-drain outputs. Can you please confirm their states during start-up when Vin is still ramping up, i.e., before there's I_load? Are these signals the same with a power good signal?

2. What's the acceptable voltage ripple for Vs?

Best Regards,
Brian

11 months ago

0 Sarah Raines 11 months ago

TI__Expert 8720 points

Hi Brian,

1.) FLT pin should be pulled up to the VCC supply independent of the Vin ramp start up.

2.) Checking on this.

Thanks,

Sarah

0 Sarah Raines 11 months ago in reply to Sarah Raines

TI__Expert 8720 points

HI Brian,

There is no voltage ripple requirements as long as you are not violating the absolute maximum ratings.

We do test to the ISO-16750-2 standard that includes superimposing AC signals on the supply.

Thank you,

Sarah

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TPS4811-Q1: FLTI_L & FLTT_L State During Start-Up and Acceptable Ripple on Vs