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LMR 62014 or TSP61175

JON WARNER1
Prodigy 10 points
Other Parts Discussed in Thread: LMR62014, LM3017

I am looking for DC/DC converter with the following specifications: 6V +/- 1.0V in and 12V +/_1.0V out, I max =0,5A. Both the LMR 62014 and the TSP61175 units come with an evaluation module which makes testing simpler and is important for me in selecting a component.  The application requires that during shutdown the input power is switched off and goes to zero while the output load remains connected to the module.  Current draw on the output is between 15mA to 30mA, the 0,5A spec. is for reliability, this amperage requirement maybe to high, I don't know. 

Are both the LMR and the TSP modules useful in this application and which would the best, and why? Is there a better unit that has an evaluation module available?

Thank you for any help you can provide,

Jon

  • 0
    TI__Genius 16025 points

    I'm looking into this and will get back to you shortly.

    Thanks,

    Anston

  • 0 in reply to Anston Lobo
    TI__Genius 16025 points

    Have you tried comparing these two in Webench? It will help you select the best components and compare the parts efficiency, cost, solution size and a whole lot more.

    If this tool is inadequate for your needs, let us know in more detail what you are looking for.

    Thanks,

    Anston

  • 0 in reply to Anston Lobo
    TI__Genius 16025 points

    Also, do you mean you want the controller to not supply Vin to the output when it is in Shutdown?

    Best,

    Anston

  • 0
    TI__Genius 15810 points

    Jon,

    If you are not looking at high load requirements then the LMR62014 could be the one for you. You may find it difficult to do 5V to 13V at 500mA, but 6 to 13 or 5 to 12V might be possible. The LMR62014 has a 1.4A FET and at high duty cycles and 500mA, this limit is close. the TPS device has a 3A switch, so you could do the high current design. But if you are not using it for high current, then you could get away with the LMR device.

    Other big advantage of the LMR device is that the compensation is internal, so you do not have to deal with tuning it. It also helps with a reduced BOM count. The cost is a fairly big factor too. The LMR device is a dollar cheaper. 

    Now, if you want to disconnect your input at shutdown, both of these devices do not have intrinsic technology to assist you. You will have to use a power FET at the input side and have the shutdown signal control it's turn on. If you need to use a boost device that can also be used to disconnect the input supply, then you could use the LM3017. This is a controller and could get expensive.

    Hopefully, this will help you decide.

    Regards,
    Akshay