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TS5A3157: Does TPS5A3157 support 1.8Vcc for eSPI application?

Alan Chang
Intellectual 1960 points
Part Number: TS5A3157

Hi,

   My customer designs TPS5A3157 for eSPI application, however, 1.8Vcc cannot work, but 3.3Vcc is OK. 

   Schematic and waveforms are shown below. Why cannot work at 1.8Vcc?

 

  • 0
    TI__Expert 3515 points

    Hi Alan,

    It looks like they have 0ohm resistors between the channels, can the customer remove the mux and confirm the circuit works when directly connected?

    For the 3.3V case, can they provide similar waveforms as the one they provided for the 1.8V case? The TS5A3157 should work at both voltage levels without issue.

    Thanks,
    Tyler