• State Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 235 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

LM5110: Alternate of LM5110-3SD

Pankaj Kumar
Prodigy 15 points
Part Number: LM5110

Tool/software:

Hi All,

        Kindly refer the below input and suggest me a solution please.

  1. For a design I require to generate a pulsed output of level "0V & -10V" at a max of 25 MHz.
  2. This pulsed output has to controlled by a "input pulsed signal" of same 25MHz frequency. Two "input option" is available as either "0 to +3.3V" or "0 to -5.0V" and any one can be used as input control.
  3. Basically it is a voltage level convertor to -10V from input (either 3.3V or -5.0V).
  4. Design requires to meet high transition speed and minimum propagation delay (40ns or less).
  5. I found "LM5110-3SD" suitable (In simulation) for my application as it is having separate pin for input reference (IN_Ref) and complementary outputs, but seems this part is going to obsolete soon.
  6. Kindly suggest me a solution for this design requirement or any alternate part for LM5110-3SD having minimum PCB area.
  7. Design having available power supply of -5V, -10V, +3.3V and +1.8V and can be include more if required.

Thank You

  • 0
    TI__Expert 7135 points

    Hi Pankaj,

    I will follow up with you on this question by early next week.

    Thanks,
    Rubas

  • +1 in reply to Rubas Khalid
    TI__Expert 7135 points

    Hi Pankaj,

    Thank you for your patience. This is a very unique setup, and looking at the datasheet, I think it may be possible to output 0V to -10V with this device. The UVLO for this device is 2.9V typical, but the test condition is Vcc - IN_REF, and if your Vcc is 0V and IN_REF is -5V, then the potential difference is 5V, which passes UVLO threshold. However, I would still recommend testing this setup thoroughly to make sure it actually outputs 0V to -10V.

    If you are using -5V as the IN_REF, then the input signal should also be referenced to -5V, so your 0V to -5V signal would be better. I would still recommend a VDD bypass capacitor.

    The LM5110 could operate at 25MHz, but please ensure that the junction temperature is within the parameters listed in the datasheet. The switching frequency being that high could potentially cause overheating.

    Also, there's no indication for that part going obsolete. Can you share where you found that information?

    Thanks,
    Rubas

  • 0 in reply to Rubas Khalid
    Prodigy 15 points

    Hi Rubas,

         Thank you for replying. As suggested I will add the "VDD bypass capacitor" in design. Once confirmed that this part is not going to obsolete then I will try to test the design on test bench level. I seen in "mouser" website (screenshot attached) that this part is end of life. Can you please confirm one more time on obsolescence !

    25MHz Operating frequency is chosen for safer side of design operation. In actual it is going to operate at less frequency and hope will meet the junction temperature permissible limit. I will test this on test bench also.

    Thank You

  • 0 in reply to Pankaj Kumar
    TI__Expert 7135 points

    Hi Pankaj,

    Thanks for sharing that screenshot. I will check back and let you know what the obsolescence status is.

    Thanks,
    Rubas

  • 0 in reply to Rubas Khalid
    TI__Expert 7135 points

    Hi Pankaj,

    I checked back and found out that the OPNs that are offered in small reels are being discontinued. The LM5110-3SDX/NOPB is the large reel OPN, and it will continue in production. 

    Thanks,
    Rubas

  • 0 in reply to Rubas Khalid
    Prodigy 15 points

    Hi Rubas,

       Thank you for clarifying the issue. I will try to purchase the part and test the design on test bench. Again Thank to you Rubas for your kind support and quick response. 

    Thank You