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  • TPS7A57: Unexpected sine wave at the output

    Resolved
    Part Number: TPS7A57 Other Parts Discussed in Thread: LMS3635-Q1 , LM1084 Hi! I'm using TPS7A5701 chip in compination with LMS3635-Q1 DC-DC. The idea was to create a voltage follower with clean output. The problem is that I see a sine wave with the frequency…
    • Resolved

  • RE: TPS7A57: Simulation error after 1.2V output.

    Hi Edgar, Using the Rref is a nice to have to set the nominal output of the LDO before the DAC EEPROM is programmed. The DAC POR value will be pull high at 3.3V setting the reference too high. We have a jumper to disconnect the DAC connection, but I don…

  • TPS7A57: BIAS PIN VOLTAGE RANGE

    TI Thinks Resolved
    Part Number: TPS7A57 Hi, We are using TPS7A5701RTER for 3.3V to 1.8V, 1.5V to 1.1V, 1.5V to 0.9V, 3.3V to 2.5V, 5V to 1.8V conversion. For BIAS pin, if input voltage is less than 1.1V, bias voltage needs to provided. If not we can leave the BIAS pin open…
    • Answered

  • TPS7A57: Problem with Pspice model

    Resolved
    Part Number: TPS7A57 I tried downloading the Pspice model for this device (sbvm989.zip), and on opening the design in TI-Pspice I get a "Warning(ORCAP-2460):Problems detected with TI model libraries configured in this design." error message. …
    • Resolved
    • Answered

  • TPS7A57: Output voltage not as expected

    Resolved
    Part Number: TPS7A57 Hello, We are implementing the TPS7A57 as follows: https://imgur.com/RVTk2RR I measure the output voltage as 2.1V when our reference from the DAC MCP4728 is 0.93V. We have shorted the bias and input voltage to 3.3V although it doesn…
    • Resolved
    • Answered

  • TPS7A57: Need a solution for CP_EN pin switching noise

    Resolved
    Part Number: TPS7A57 Hi, We are using TPS7A57 for our design to generate V out =3.3 V@ 5 A from V in = 3.6 V. This V out is given as power input to clock synthesizer for HS ADC. So there is huge constraint on Noise. Now I'm facing problem with CP_EN…
    • Resolved

  • TPS7A94: SNS pin, LDO buffer TPS7A57 vs. TPS7A94

    TI Thinks Resolved
    Part Number: TPS7A94 Other Parts Discussed in Thread: TPS7A57 , Hello, I would like to ask the differences between TPS7A57 and TPS7A94 sensing. It seems SNS in TPS7A57 is used for output regulation connecting directly to the unity gain buffer; so I assume…
    • Answered

  • TPS7A57: Generation of 5V out from 5.5V input without any additional input/bias voltages

    Resolved
    Part Number: TPS7A57 Hi Please refer the image below. I need to generate 5V from 5.5V supply, but above is not generating the same. It is found that bias pin requires minimum of 8V input to generate the same. If i'm operating the same in charge pump…
    • Resolved

  • TPS7A57: Precision EN Equation #1

    TI Thinks Resolved
    Part Number: TPS7A57 What is V EN in Equation #1 of the Precision EN equations (pg. 53)? Should it be V IH(EN) ? Thanks for the help!

  • TPS7A57: double confirm: set CP_EN low disable internal charger pump

    TI Thinks Resolved
    Part Number: TPS7A57 Hi, Dear Product line engineer one thing need double confirm associated with TPS7A57. as below figure shows, the internal charge-pump was disabled and internal circuit was powered by bias, right? under this conditions, could circuit…

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