• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 376 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LMR62014: Minimum Vout specification

JH Shin
Guru 11190 points
Part Number: LMR62014

Hello,

In LMR62014 datasheet, there is minimum Vout conditions for RL.

1. Please explain what RL stands for.

2. My customer considers using the LMR62014 with Vin 5V, Vout 5.8V. Can't LMR62014 be used in this case?

Thank you.

JH

  • 0
    TI__Mastermind 34231 points

    Hi JH,

    Thanks for reaching out.

    1. RL stands for resistance load. 

    2. How about the load current of 5.8V? Please make sure inductor peak current won't trigger device switch current limit. 

  • 0 in reply to Zack Liu
    Guru 11190 points

    Hi Jack,

    Thank you for your reply.

    1. Could you please expain more detail? Why does the min Vout differ by the resistance load ?

        If the load current changes, doesn't the resistance load also change?

    2. It will be used on the Vsys input of the TPS6508640 for Vin 5V application.

        Depending on the user's design, I think it can be used from 40mA to 400mA. Could you tell us how to design the LMR62014 with Vin 5V, Vout 5.8V.

    Thank you.

    JH

  • 0 in reply to JH Shin
    TI__Mastermind 34231 points

    Hi JH,

    1. This 'Minimum Output Voltage Under Load' spec means with the provided resistance load RL, the minimum output voltage that this device can output. For example, Vin=3.3V, Rl=15ohm, the output voltage can be set to 6.5V typically by user. With same 3.3V Vin, if user set Rl=43ohm, the output voltage can be set to higher, such as 10V typically. Reason is with higher output voltage, the load current Iout is larger (Iout = Vout/Rl), then inductor current in steady state is larger until it triggers the device switch current limit. 

    So this spec is trying to showing using an approximate output voltage range under certain Vin,Rl conditions.

    2. You can use WEBENCH tool on ti.comm to design the circuit with your Vin/Vout specs.