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TPSM63602: Recommended maximum input supply rail voltage for 3V to 36V input of TPSM63602 synchronous buck DC/DC module

Peter Roos
Prodigy 90 points
Part Number: TPSM63602
Other Parts Discussed in Thread: LMZ34202

I am considering using the TPSM63602 buck converter in a system to generate 16V output based on a 36V input voltage. The TPSM6302 is rated for an input voltage range of 3V to 36V so my application would come in at the upper spec of this buck converter. The absolute maximum voltage for this converter is specified as 40V. 

I would tend to look for another buck converter with a wider input range so I'm not operating this device at the maximum specification, but what is the actual guideline for selecting an input voltage range? What is a good input range margin to consider since technically this buck converter 'could' work for my purpose?

The datasheet, page 14 is stating: "The device is intended for step-down conversions from 5V, 12V and 24V supply rails". Then page 15 of the datasheet is stating: "The TPSM63602 module is intended for step-down conversions from typical 12V, 24V and 28V supply rails. So is the 24 (or 28V?) the intended input range for this converter?

Best,

Peter

  • 0
    TI__Guru* 77340 points

    Hi Peter,

    Thank you for considering our products.  What is your load current?  May I assume the TPSM63602 can support your load?  Then, it is good to for your application, under the condition that your input voltage will not exceed 36V dc and it may have some transients of short period but never exceed 40V abs max rating. 

    I believe 28V was a typo although it does not violate the IC's operating range.  It seems the writer wanted to highlight the applications to the popular 5V, 12V or 24V systems.   In a 24V system, the voltage can vary to 36V during a transient.   Anyway, as long as the VIN is not exceeding 36V, this part should be good to use.

    If you want to more voltage margin, you may take a look at LMZ34202 but it is a 2A part.

    Thanks,

    Youhao

  • 0 in reply to Youhao Xi
    Prodigy 90 points

    Hi Youhao,

    Thanks for the response. 
    Load current exceeds 2A but the key is keeping the input from exceeding 36V as I thought as well, so we have to be careful and build in as much margin on our end as possible to avoid this from happening. 

    Thanks again!

    Peter