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TPS3808
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  • Forum Post: TPS3808 - Can SENSE be powered without Vdd?

    Leslie Chataway
    Question/Problem: Can SENSE be powered without Vdd? Answer: Product team replied that this was possible.
    on Aug 21, 2008

  • Forum Post: Re: TPS3808G09

    Stephen Taranovich
    Customer came back and said: Attached is part of the circuit that includes the supervisor and the DC-DC switcher. As you can see I'm going to monitor the battery voltage. When it's 0.9 V - the battery is practically dead - I want the output of the TPS3808 U21 shuts down the switching power...
    on Jan 7, 2010

  • Forum Post: TPS3808

    Stephen Taranovich
    Attached is part of the circuit that includes the supervisor and the DC-DC switcher. As you can see I'm going to monitor the battery voltage. When it's 0.9 V - the battery is practically dead - I want the output of the TPS3808 U21 shuts down the switching power supply U23. Vcc is 3 V and generated...
    on Jan 22, 2010

  • Forum Post: Re: TL7712, TL77*

    Chris Glaser
    It should be RESET bar (pin 5). When the supply or sense lines are low (out of spec), the RESET outputs go active, which is low for RESET bar and high for RESET. If you would like a newer SVS, look at the TPS3808 family.
    on May 28, 2010

  • Forum Post: Re: Setting TPS3803-01

    Chris Glaser
    To monitor 1V rail, the IC's internal reference voltage needs to be less than 1V. So, you cannot use the TPS3803 to monitor a 1V rail, as its reference is ~1.2V. I recommend using the TPS3808G01 or G09 to monitor your 1V rail.
    on Jun 18, 2010

  • Wiki Page: TPS3808Gxx - Can SENSE pin voltage exceed Supply Voltage?

    Michael Day
    Q: TPS3808Gxx - Can SENSE pin voltage exceed Supply Voltage? by 605709 Hello, Customer would like to use TPS3808G33 to monitor 3.3V supply, but power from 1.8V. Datasheet implies that this is O.K. based upon ABS max rating of 7V for the SENSE pin independent of Vdd. Please confirm. Thanks! ...
    on Sep 15, 2010

  • Forum Post: power monitor/detector hysteresis for solar panels

    Digi-Man
    My question has to do with monitoring and control of a voltage rail from a solar panel. I have a circuit that monitors the incoming voltage from the panel and when it reaches 3.0V it turns on a voltage regulator(TPS78033) for the rest of the circuit. My problem occurs when in low light the voltage rail...
    on Sep 29, 2010

  • Forum Post: Re: power monitor/detector hysteresis for solar panels

    Bill Stokes
    I think your idea to use a separate supervisor -like the TPS3808 found in that application note, SLVA360 - is a good one. I have used similar divices in this type of schmidt trigger arrangement to accomplish similar results. It might be easier for you to order an Evaluation Module (TPS3808G01DBVEVM)...
    on Sep 29, 2010

  • Wiki Page: TPS3808 /RESET pin current

    Chris Glaser
    Q: TPS3808G33 /RESET pin current by 1166096 TPS3808G33 datasheet gives /RESET pin current as 5mA in "Absolute Maximum Rating" table on page 2. What is the significance of the this current? A: Re: TPS3808G33 /RESET pin current by 1090425 This is the maximum current that the /RESET...
    on Nov 16, 2010

  • Forum Post: TPS3808 /MR pulse width

    wlodek solarz
    My previous post was unclear. The question is: Is 1ns pulse width on MR input enough for correct generation of a RESET pulse on TPS3808 output?
    on Jan 1, 2011

  • Forum Post: Re: TPS3808

    Michael Day
    The TPS3808 /MR pulse width (Tw parameter in datasheet) should be designed to be 20ns minimum to guarantee the TPS3808 detects the signal across all worst case conditions.
    on Jan 6, 2011

  • Forum Post: Re: TPS3838E18 open-drain !RESET: allowable pull-up resistor values

    Chris Glaser
    I do not recommend using a resistor that small with the TPS3838. Using a 3k resistor would violate the recommended operating conditions in the TPS3838 datasheet which specifies a minimum value of pull up resistance. This is only a recommended operating condition because it is not necessary under some...
    on Feb 1, 2011

  • Wiki Page: TPS3808G01 MR: can it be asserted during power-up?

    Michael Day
    Q: TPS3808G01 MR: can it be asserted during power-up? by 15398 I just wanted to confirm that the TPS3808G01 power up and operate correctly if the MR input is asserted during its power up sequence? A: Re: TPS3808G01 MR: can it be asserted during power-up? by 10449 The TPS3808 will operate...
    on Feb 8, 2011

  • Forum Post: TPS3808 output state

    Tony51646
    Hi, The working voltage range of VDD is +1.7V to +6.5V, but what is the RESET output state (Low or High) when VDD is below +1.7V? Thanks,
    on Feb 23, 2011

  • Wiki Page: TPS3808 undefined output state

    Michael Day
    Q: TPS3808 undefined output state by 1682396 Dear all, I have a question about TPS3808's undifined output state. Datasheet says when Vd is under 0.8V, reset signal is undefined. Can i understand that reset signal can be both state high and low irrespective of Vsense signal? If so,...
    on Mar 17, 2011

  • Forum Post: Re: TPS3808-EP /MR pulse width

    Michael Day
    If you need to filter noise off of the TPS3808 /MR ( master reset) input, you can use an RC filter to ensure the TPS3808 only responds to your signal. Without any filtering, the TPS3808 could react to a 0.001us /MR pulse.
    on Apr 15, 2011

  • Forum Post: Re: TPS3808-EP /MR pulse width

    Michael Day
    There is additional information on the TPS3808 /MR in another post in the forum. This post is found by searching on "TPS3808 /MR" http://e2e.ti.com/support/power_management/svs_and_sequencers/f/212/p/86459/298502.aspx#298502
    on Apr 15, 2011

  • Forum Post: Re: Open Drain Output of TPS3808G50

    Chris Glaser
    This is allowed. The RESET output can be pulled up to any voltage lower the maximum rating of 7V.
    on May 6, 2011

  • Forum Post: Re: Question for TPS3808 VDD level

    Darwin Fernandez
    Hello Joy, Welcome to the forums! The minimum voltage to power and operate the device is indeed 1.7V. However, as shown in the electrical characteristics of the datasheet, the minimum voltage to have a definite RESET (HIGH or LOW) is 0.8V. As you can see from the timing diagram, the RESET output...
    on Mar 7, 2012

  • Forum Post: RE: Difference in TPS3818 and TPS3808 Family

    Darwin Fernandez
    Hi Kepcoate, As stated on page 3 of the TPS3818 datasheet. The 40% is the base tolerance not including the external capacitor tolerance (same as the TPS3808). For higher time accuracy, you could use TPS3818 to achieve 15% tolerance. In the TPS3818 datasheet, the CT pin charge current and trip voltage...
    on Jun 22, 2012

  • Forum Post: RE: tps3808-ep adjustable

    Darwin Fernandez
    Hi Calum, The TPS3808 is a great fit for your application! To clarify, VDD is NOT programmable; you must operate within 1.7V-6.5V for the device to operate. You can use the 5V rail for VDD. Looking at the product page, the ICs that are active are the adjustable (-01) version and the fixed 3.3V (-33...
    on Oct 30, 2012

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