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  • RE: LMR33640: EN Pin Voltage Level When Using LMR33640 in Inverting Configuration

    Hello I will close this post due to inactivity. Thanks

  • LMR33640: Inverting Buck-Boost +12v to -5v

    Part Number: LMR33640 Tool/software: Hi all, I am trying to recreate the inverting buck-boost converter with the lmr33640 as shown in application note "Working With Inverting Buck-Boost Converters", snva856b. But i am having a hardtime getting…
    • Answered

  • LMR33640: +/- Step-down Output with Sepic Design

    Resolved
    Part Number: LMR33640 Tool/software: Dear Experts Greetings from Istanbul. I need advice abouth my An inverting and non-inverting step-down output design. Due to my limited pcb space and component count I need to get both + and - output from a single…
    • Resolved
    • Answered

  • LMR33640: IBB pspice simulation

    Resolved
    Part Number: LMR33640 I downloaded LMR33640D reference design and tried IBB simulation. But the result was different from the attached image. (VOUT was ramped up, not ramped down) Do you know why?
    • Resolved
    • Answered

  • LMR33640: Output Voltage is Affected by the Load

    Resolved
    Part Number: LMR33640 Hello, I wanted to test the LMR33640 -3.3V circuit (Inverting Buck-Boost Converter topology) before designing the PCB. I have used the circuit at page 15 from: https://www.ti.com/lit/an/snva856b/snva856b.pdf?ts=1715618037917 (changed…
    • Resolved
    • Answered

  • LMR33640: Used for negative voltage

    Resolved
    Part Number: LMR33640 Other Parts Discussed in Thread: LMZ14203 Hello, I am using LMR33640 to generate a few positive voltages and LMZ14203 to generate a negative voltage, recommended by WEBENCH. I'd like to know if is possible to use LMR33640 to generate…
    • Resolved

  • LMR33640: Problem with LMR33640ADDAR => When switched on, voltage peaks of up to 21V are maintained

    Part Number: LMR33640 Hello, we use the LMR33640ADDAR to generate from 24V DC our used voltage of 3.3V DC. We use this chip with the layout of the data sheet but now we have two times that all our chips which where connected to this power-chip are damaged…
    • Answered

  • LMR33640: LMR33640ADDAR output +5V/4A and the other LMR33640ADDAR is as inverting buck-boot to generate -5A/2A from 12V/2A

    Resolved
    Part Number: LMR33640 Other Parts Discussed in Thread: LMR33630 Hi Ti, Pleaase help review below schematics, one LMR33640ADDAR output +5V/4A(3A is OK) and the other LMR33640ADDAR is as inverting buck-boot to generate -5A/2A from 12V/2A Please you recommend…
    • Resolved
    • Answered

  • LMR33640: Current injection of FB pin with a voltage DAC

    Resolved
    Part Number: LMR33640 Hi, I would like my math to be reviewed as a mistake is easily made. My goal is to have a voltage DAC control the LMR33640 between +8V and +24V with an input voltage of 24.3V. The DAC can output between 0 and 2.048V and can sink…
    • Resolved

  • LMR33640: CFF calculation

    TI Thinks Resolved
    Part Number: LMR33640 Hello. About LMR33640, at page 21/44 of the datasheet is shown this equation. My question is about the value of Cout. For example, if I am going to use 3x 22uF (22uF nominal) ceramic capacitors at output. Then at the equation should…

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