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TPSM84209: Inverting the TPSM84209

Andrew Chin82
Prodigy 160 points
Part Number: TPSM84209
Other Parts Discussed in Thread: LMZM23601,

Is it possible to invert the TPMS84209 like you can with the LMZM23601?

  • 0
    TI__Expert 4875 points
    Hi Andrew,

    Yes, I think so. It can be use as an inverting buck boost. Connect Vout pin to your board GND and connect the GND pin to your inverting rails. Just a reminder that EN pin max input is 7V. You may need to have a resistor divider connect to it.

    Could I know what is your application for this inverting use? We seldom have customer to use like this. I am quite interested in your application. Thanks!
  • 0 in reply to Anthony Lang
    Prodigy 160 points
    The LMZM23601 seems to have a lot of stock issues at the moment, so I was looking at other small converters. This, even though it can be over kill, seems to fit the bill. Aside from the the unique form factor and higher current, do you happen to know what else differentiates between these two products. To me, there are just dc/dc converters that do what I want.
  • 0 in reply to Andrew Chin82
    TI__Expert 4875 points
    Hi Andrew,

    For ti power module, we build it to make it easy to use. So if the module fits your Vin, Vout and Iout, there should be no big difference on electrical between them. For comparison between LMZM23601 and TPSM84209, the main difference is on package and cost. LMZM23601 is in Microsip package and it is famous for its small size. But the cost is relatively at medium or high level and the thermal is limited due to the small size. For TPSM84209, this is our first flip chip QFN module and it is the best cost optimized module. The cost is much cheaper and the current is even higher. And it is a molded module.

    If TPSM84209 could work for your application, i would recommend you to use it for its low cost and good thermal performance.