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TPS61170DRVT Thermal Pad SR#1-1584718440

J Thanks
Intellectual 1155 points
Other Parts Discussed in Thread: TPS61170

The customer would like to know if the thermal pad on the TPS61170DRVT is internally connected to ground or not as he will be having a negative voltage on ground.

-12V to -5V converter:  (See attached file: 12VN_5VN converter.PNG)
This uses the TPS61170.  Here we are really unsure about the requirements for the GND-EP (thermal pad).  We initially had this connected to earth ground, but as with the other part we now wonder if it should be connected to the same potential as pin 3 (GND).  

Any information on the internal electrical connection of the thermal pads for these parts is greatly appreciated.

  • 0
    TI__Intellectual 2270 points

    Hi

    I checked with our product engineer, the thermal pad is not bounded to GND pin internally. this pin is connected to substrate with non-conductive and conductive compound. as the substrate is thick enough, the result is high-res when check the resistance between GND pin and thermal pad.

    PS: what's the detail application need -12v to -5V. could u help share some details?thanks.

    Charles from Boost converter solutions

  • 0 in reply to Charles Wong1
    TI__Intellectual 1155 points

    Hi Charles, unfortunately the customer did not provide more details regarding his application. I provided the customer with the answer you provided. Thank you for your help.

    .