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TPS40170-Q1: [TPS40170QRGYRQ1] TPS40170QRGYRQ1 vs TPS40170RGYR / Inquiries about the difference in characteristics

MJ Jeon
Genius 5240 points
Part Number: TPS40170-Q1
Other Parts Discussed in Thread: TPS40170, LM25145, LM5146, LM5145,

Hi, TI Support Team

The customer is currently reviewing alternative products due to delivery issues for existing products.

The following inquiries have been received and will be contacted.

1. Operating temperature

- The datasheet has different specs for the temperature specs of the two products.

- Existing product (TPS40170QRGYRQ1): TA

- Substitute (TPS40170RGYR): TJ

- Questions

Is it the same wafer and package?

What is the reason for the difference in operating temperature (specified)?

What is the operating temperature spec for each?

2. ESD Ratings

- Conventional product (TPS40170QRGYRQ1): HBM ±750 / CDM ±500

- Substitute (TPS40170RGYR) : HBM 2000 / CDM 1000

- Question

Why is the "-" side not guaranteed for replacement products?

Thanks.

Regards,

MJ

  • 0
    TI__Guru 53312 points

    Hi MJ,

    1. The applicable operating junction temperature range is given in the datasheet Recommended Operating Conditions table of the TPS40170 and is the same for both parts: -40 to +125 degC.

    2. + and - are understood for both products (it is not meant to be specified as unipolar).

    Note we are now recommending the LM25145/LM5145/LM5146 controller family instead of the TPS40170. It has the same voltage-mode architecture but is lower cost and better performance.

    Regards,

    Tim

  • 0 in reply to Timothy Hegarty
    Genius 5240 points

    Hi, Tim

    Thank you for reply.

    I have additional inquiries regarding the answer to item 2.

    Although it is not described in the handling rating of TPS40170RGYR, can it be understood as a range of + and - in reality?

    Thanks.

    Regards,

    MJ

  • 0 in reply to MJ Jeon
    TI__Guru 53312 points

    MJ,

    Yes, +/- is understood here. The min should be -2000V and -500V for HBM and CDM, respectively.

    Regards,

    Tim

  • 0 in reply to Timothy Hegarty
    Genius 5240 points

    Hi, Tim

    There was a request for the following information from a customer.

    I am asking for help as there is a lack of writing through the datasheet.

    Please share information about the table below.

     

    TPS40170-Q1

    TPS40170

    Ambient temp.

     

     

    Operating temp.

     

     

    Junction temp.

     

     

    Storage temp.

     

     

    Thanks.

    Regards,

    MJ

  • 0 in reply to MJ Jeon
    TI__Guru 53312 points

    Hi MJ,

    Only the operating junction temperature and storage temperature are applicable here. The ambient temperature is not really relevant for a power-dissipating IC as the junction operates above ambient based on the J-to-A thermal impedance.

    The junction temperature range for both parts is -40°C to 125°C, and the storage temperature range is -55°C to 150°C.

    As an aside, I recommend using the LM5145 controller family here as it is lower cost and better performance relative to the TPS40170. The LM5146 100V version is actually rated to 150°C junction.

    Regards,

    Tim