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TPS3703-Q1: Adjust Manual Reset time

Roy Chou1
Genius 14635 points
Part Number: TPS3703-Q1
Other Parts Discussed in Thread: TPS3898, TPS3897, TPS3896, TPS3895

Hi all,

Below is the manual reset introduction. As I know, when Vsense is normal and MR_bar is lower than VMR_bar_low && tMR_bar_w > 1us(datasheet), and then Reset_bar is low. I would like to know, could we adjust the tMR_bar_w from using external circuit? or do we have rest IC which could adjust the tMR_bar_w? (at least 100ms)

By the way, I would like to know, do we have the reset IC which has function of below point

1. for example, Vmon = 1.2 V and has an X pin, if sense volatge = 1V and X pin go high >100ms the reset_bar output=0, if sense volatge = 1V but X pin go high <100ms the reset_bar output=1 

  • 0
    TI__Genius 12630 points

    Roy,

    1: could we adjust the tMR_bar_w from using external circuit?

    Answer: tMR_bar_w is caused by the user because /MR is an input. In the above diagram, t_PD(/MR) is fixed, and t_D(/MR) is programmable with capacitor

    2: 

    do we have the reset IC which has function of below point

    1. for example, Vmon = 1.2 V and has an X pin, if sense volatge = 1V and X pin go high >100ms the reset_bar output=0, if sense volatge = 1V but X pin go high <100ms the reset_bar output=1 

    Answer: Yes, we have solution that will work. It uses TPS3895, TPS3896, TPS3897, TPS3898 family. Please email me at michaeldesando@ti.com and I can work with you to provide detailed solution.