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TMP708: OT connects to Soft Start pin

[FAE] Andrew Wang
Genius 10685 points
Part Number: TMP708
Other Parts Discussed in Thread: LM5025,

Hi team

customer connects OT pin to LM5025 SS pin, that pin is a current source, and there is no external pull up resistor, is this ok to design like this? Thx.

Andrew 

  • 0
    TI__Guru* 91206 points

    Dear Andrew - 

    Thanks for posting. The OT pin on the TMP708 device is open drain, active low output - it requires a pullup resistor to function properly. 

    Furthermore, on the LM5025 device, the SS pin is intended to only have capacitor connected to it, and it is also an output.