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TPS59650: Can TPS59650 be used as Alternative of TPS59641.

RAJ KUMAR
Prodigy 240 points
Part Number: TPS59650
Other Parts Discussed in Thread: TPS59641

Hello TI Team,

I have talked with TI Supports about this component's simulation. Now my all other doubts are clear, Thanks TI for the response.

Now I have one last thing to get confirmed.

As I couldn't find any Vboot voltage in TPS59650 datasheet but TPS59641 has 1.1V Vboot. Now my doubt is whether both parts are compatible while considering this VBOOT difference?. What would be default voltage when SVID command is not yet received? 

My Operating conditions are as follows- 

Processor - INTEL ATOM E3826.

Supplies- 1 CPU, and 1 GPU

CPU (Nominal Voltage) - 1.0V

GPU (Nominal Voltage)- 1.0V 

Icc(max) on CPU - 10A

Icc(max) on GPU - 4A. 

TMS59641 is used in Evaluation board Bakersport and Intel Baytrail-I.

 

Thank You 

Raj Kumar

  • 0
    Prodigy 240 points

    Hello TI Team,

    I have checked some other IMVP7 (SVID) based multi-phase regulator from varies make, and Most of them have clearly mentioned the Vboot (sometimes programmable Vboot) voltage. Now, I am really concerned because TPS59650 Part does not provide any information regarding Vboot & My processor (Intel Atom E3826) requires 1.0V or 1.1V Vboot. 

    Please reply at the earliest as I have completed literally everything in PCB design.   

    Thank You

    Raj Kumar

  • 0 in reply to RAJ KUMAR
    TI__Genius 10046 points

    Hi Raj, 

    It looks like the Vboot for IMVP7 is 0 V. It doens't look like the TPS59650 has NVM which means the vboot is not programmable. If your processor needs a Vboot of 1.1 V then I would not use TPS59650. 

    Best,
    Ryan

  • 0 in reply to Ryan Chen
    Prodigy 240 points

    Hi Ryan,

    Thank You the response!

    Yes, I got it that there is certainly a difference between VBOOT of both the devices. 

    Please help me out with getting the clear idea about VBOOT- 

    Does VBOOT means the default output voltage of the regulator which will appear from VR_ON Pin High to until the device receives any SVID command from SoC?

    For the reference, Please preview the output waveform of TPS59650's Pspice simulation.

    Same image is attached in PDF format also.

    trans4.pdf

    Thank You 

    Raj Kumar

  • 0 in reply to RAJ KUMAR
    TI__Genius 10046 points

    Hi Raj, 
    That is correct. Vboot is the default output voltage if you were to enable to controller without any commands from PMbus. 
    Best,

    Ryan