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LTM2881IV-5#PBF Transceiver IC 's Inbuilt DC-DC Converter

HI,

We are using  LTM2881IV-5#PBF IC, in our Project. Output of inbuilt DC-DC Converter is zero while measuring IC's ON Pin, it is 5V. so in which conditions the inbuilt DC-DC Converter 's output becomes Zero ?

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  • Hello, 

    While the ON pin is asserted, the LTM2881 should power up . 

    What are the measured voltages on the VCC and VL supply voltages? Does the VCC in particular have a clean stable power supply in the 4.5V - 5.5V range? 

    Is it possible to capture a waveform of the VCC and VISO output voltages as the ON pin is asserted from 0V to VL? This will allow us to debug the start up behavior of the device, 

    Regards,

    Neil 

Reply
  • Hello, 

    While the ON pin is asserted, the LTM2881 should power up . 

    What are the measured voltages on the VCC and VL supply voltages? Does the VCC in particular have a clean stable power supply in the 4.5V - 5.5V range? 

    Is it possible to capture a waveform of the VCC and VISO output voltages as the ON pin is asserted from 0V to VL? This will allow us to debug the start up behavior of the device, 

    Regards,

    Neil 

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