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TLV767-Q1: TLV767-Q1

Ajay Sahu
Prodigy 225 points
Part Number: TLV767-Q1

Hi,

Can you Please provide the value of line regulation for Vin=6.5V (5% Tolerance) & Output current (550mA).

And also the value of Load Regulation For Output current 550mA( 5% tolerance).

Output voltage is 5V(2% Tolerance)

Can you also provide the variation of Output voltage with respect to temperature. at 550mA

Regards.

Ajay

  • 0
    TI__Mastermind 38075 points

    Hi Ajay,

    We don't have data for these specific data points, but you can use the line and load regulation specs to calculate the max output voltage deviation. The contribution from line regulation is 0.02%/A * .55A = .011%, which is .011% * 5V = .55mV. For load regulation the contribution is 0.5%/A * .55A = .275%, which is .275% * 5V = 13.8mV. These calculations are over the full temperature range. 

    For your last question I think Figure 6-1 has the information you are looking for.

    Regards,

    Nick

  • 0 in reply to Nick Butts
    Prodigy 225 points

    Actually I want to find out the variation of output voltage with respect to temperature coefficient by using the below formula. So the graph you refer is for Vin=3V My Input voltage is 6.5V(with 5% tolerance). If you provide me the value of temperature coefficient it would be helpful.

    I also want Curve between ESR Vs load current.

    Thanks

  • 0 in reply to Ajay Sahu
    TI__Mastermind 38075 points

    Hi Ajay,

    A temperature coefficient as you have defined is not particularly useful for an LDO because the temperature response is almost never linear. It is much more useful to calculate the maximum deviation as I did in my previous response. 

    For the ESR vs. load current, do you mean RDS_on vs. load current? 

    Regards,

    Nick

  • 0 in reply to Nick Butts
    Prodigy 225 points

    ESR Vs Load Current See the attachment I want this graph.

    See the attachment from datasheet the value of COUT ESR. I want COUT ESR Vs load current.

  • 0 in reply to Ajay Sahu
    Prodigy 225 points

    Regarding Temperature coefficient one of the LDO datasheet of TI Below graph shown . If you provide me the same for my MPN it would be helpful.

  • 0 in reply to Ajay Sahu
    TI__Mastermind 38075 points

    Hi Ajay,

    The Recommended Operating Conditions table (6.3) specifies that COUT needs to be in the range 1uF to 220uF, and the ESR for COUT needs to be in the range 2mΩ to 500mΩ for stability. The minimum 1uF COUT and 2mΩ ESR for COUT will guarantee stability over the full load current range. This information is the same as what would be shown in a stability region plot as you mentioned. 

    Regarding the Output Voltage vs. Temperature plot, unfortunately we do not have characterization data in this form to share with you. Data was not collected in this form, so you will need to refer to the data in Figure 6-1.

    Regards,

    Nick