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  • LM26420-Q1: LM26420 fail tem test

    Part Number: LM26420-Q1 Thanks for your support After the chip returned to normal temperature after a low temperature test, the chip failed. The output voltage is less than 100mV. The resistance between sw to GND is 5 ohm. We guess the lower MOS is short…

  • LM26420-Q1: short-circuit to ground

    TI Thinks Resolved
    Part Number: LM26420-Q1 Other Parts Discussed in Thread: LM26420 , dear My circuit using LM26420-Q1, designed a way to output 3.3 V, the input is 5v, often there are veneer LM26420 SW pin resistance 4Ω or so (still work, only LM26420 extremely hot) or to…
    • Answered

  • LM26420-Q1: SW waveforms appear overshoot and undershoot

    Resolved
    Part Number: LM26420-Q1 Other Parts Discussed in Thread: LM26420 , Hi LM26420-Q1 When testing the output SW of LM26420, the test found that the SW waveform overshoot and undershoot are very serious, the undershoot reaches 1.05V, the overshoot is 0.7V, the…
    • Resolved
    • Answered

  • LM26420-Q1: When EN1/EN2 goes Low, how about PG1/PG2?

    Resolved
    Part Number: LM26420-Q1 Hello, When EN1/EN2 goes Low, what behavior is expected for PG1/PG2? If the Vout is still high enough, will PG1/PG2 keep high even if EN1/EN2=Low? Ot will it be Low immediately when EN1/EN2 goes Low regardless of FB1/FB2 voltage…
    • Resolved

  • LM26420-Q1: Power Section Review

    TI Thinks Resolved
    Part Number: LM26420-Q1 Hi, Need a review on LM26420Q1XMHX/NOPB part. Vin -5V Vout1 - 3.3V Vout2 - 1.2V Fsw - 2.2MHz Iout1 - 1.21A Iout2 - 1A Based on above details, I have updated those values in webench, Inductor values shows as 3.3uH. But as per manual…

  • LM26420-Q1: SHORTING of OUTPUTS

    Part Number: LM26420-Q1 Hi Everyone, LM26420-Q1 has 2 voltage outputs. I am planning to use the part with MPN: " LM26420Q1XMH/NOPB " Pl. suggest me whether I can short 2 outputs, so as to cater the high load (which is >2A)? If YES, any caution…

  • LM26420-Q1: Output discharge

    Part Number: LM26420-Q1 Hi I want to ask about the discharge time of DC/DC converter LM26420-Q1. For example, if the 2.2V output voltage will drop when the enable signal of the DCDC power supply is turned off, then I want to know how to calculate the…

  • LM26420-Q1: SCH review

    TI Thinks Resolved
    Part Number: LM26420-Q1 Hi Team, Could you please help to review this SCH?
    • Answered

  • WEBENCH® Tools/LM26420-Q1: LM26420-Q1 Efficiency problem

    Resolved
    Part Number: LM26420-Q1 Tool/software: WEBENCH® Design Tools Hi, I used LM26420-Q1 as dual step-down DC/DC converter with 1.8V & 3.3V output voltage. I have problem of efficiency (60%) with the outpout voltage 2 (1.8V) !!
    • Resolved

  • WEBENCH® Tools/LM26420-Q1: Need simulation model for LM26420

    TI Thinks Resolved
    Part Number: LM26420-Q1 Tool/software: WEBENCH® Design Tools Hi, I want to do simualtion on LM26420 , but there is no any simulation model and no webench support, who can provide me the simulation model or alternative simulation model,thanks!

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