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  • LMR61428: Seeking assistance in picking the right part

    TI Thinks Resolved
    Part Number: LMR61428 I'm an old-school developer with mostly linear-regulator experience and am looking for tips on picking the right 'boost' switching regulator for a specific project. It needs to take +5V in, either from a wall-wart or a battery, and…

  • LMR61428: 7 - 12Vin, 13.2Vout - What max current?

    TI Thinks Resolved
    Part Number: LMR61428 Other Parts Discussed in Thread: LMR62014 I have an operating issue that is not covered by the datasheet. I have a variable 7 to 12V in and needs 13.2V out. What current can I expect out? The LMR61428 should be rated for 2.8A, but…

  • LMR61428: Lmr61428 boot strap issue

    TI Thinks Resolved
    Part Number: LMR61428 Dear sir , I am not able to achieve boot strap operation in sample circuit mentioned in you detail document-SNVS815 on page no. 2& 12. But I m getting good result of boot strap in evaluation module i purchased from TI company.…
    • Answered

  • LMR61428: In case of light load

    Resolved
    Part Number: LMR61428 Hi all Would you mind if we ask LMR61428? In case of light load, does LMR61428 operate PFM function? Is it possible to use as fixed PWM function? Kind regards, Hirotaka Matsumoto
    • Resolved

  • LMR61428 Startup Issue

    Other Parts Discussed in Thread: LMR61428 LMR61428 Schematic.pdf LMR61428 Startup Waveforms.zip As attached are the related layout and schematic. The input voltage range of LMR61428 is 3.5V to 6V, and the output voltage is set as 8V by the resistor…
    • Answered

  • LMR61428 - output capacitance

    Resolved
    Other Parts Discussed in Thread: LMR61428 Hi all Would you mind if we ask LMR61428? The datasheet shows the following; While tantalum chip capacitors are recommended for the input and output filter capacitors, ceramic caps can also be used. Is it possible…
    • Resolved
    • Answered

  • RE: LM2623: /LM51501-Q1 - Boost 1.8-3.1 V to 6V 400mA

    Resolved
    Hi Tom, LMR61428 can be used in this application, because its control scheme uses a hysteresis window to regulate the output voltage. When the output voltage is below the upper threshold of the window, the LMR61428 switches continuously with a fixed duty…
    • Answered

  • LMR61428 - Minimum on time or Minimum off time

    Resolved
    Other Parts Discussed in Thread: LMR61428 Hi all Would you mind if we ask LMR61428? Our customer's condioton is as follows; -Vin=3.5V -Vout=4.2V -Iout=1.2A Our customer would like to calculate Maximum Fsw. However we could not find Minimum on time or Minimum…
    • Resolved
    • Answered

  • My question is related to LMR61428 IC constant voltage output at low input voltage.

    Resolved
    Other Parts Discussed in Thread: LMR61428 , LMR61428XMMEVM Sir I purchased LMR61428 IC and LMR61428 Evaluation Module LMR61428XMMEVM , When I assembled the LMR61428 IC Circuit on PCB I am getting Vout ==3.3 times of Vinput. But in Evaluation module I am getting…
    • Resolved
    • Answered

  • RE: LM2623: Controller selection help

    Resolved
    Hi Matt, LMR61428 is suitable as well, but out of stock. There are not many options, because input voltage is low to 1.8V and output current is not very small.

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