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  • LM2621: LM2621 Low Cost Version Used in Sepic

    Part Number: LM2621 Other Parts Discussed in Thread: TPS61175 , LM5157-Q1 , LM5157 Tool/software: Hi Team, Customer is asking for a low cost device which is similar with LM2621, used in Sepic topology. Could you please help provide a suitable device here…
    • Answered

  • RE: LM2621: Root Cause for burn marks above pin 7/8

    Resolved
    Thanks for the info! I'll keep that gnd path shorter in future designs

  • RE: LM2621: Set up sample application for testing. Current with enable pin set to GND causing ~50uA instead of expected 2.5uA

    Hi Jimmy, Yes as you said, the hand made boost circuit on breadboard usually has lots of strange issues. Hope the new made board will work well. If you are OK, I'd like to close this E2E thread first. You can further reply here or open a new thread if…

  • RE: LM2621: Output voltage ripple and noise

    Hi Lei, thanks for your feedback. I'm going to check the C40 with higher voltage rating. I can hear that noise trough the speaker which is connected to the TDA2005 powered from the 5VA. I wonder why there is 11,9 kHz noise since the opearional frequency…
    • Answered

  • LM2621: LM2621 in/out voltage

    Resolved
    Part Number: LM2621 Other Parts Discussed in Thread: TLV61046A Hi team, I have a project use LM2621 create 10V from 3.3V , the load current about 40mA. As show below Schematic 1 and Schematic 2 -> with input voltage is 3.3V, have any problem to generate…
    • Resolved

  • LM2621: Use of LM2621with external N MOSFET between Boost Ground to power ground for high voltage protection

    Part Number: LM2621 Other Parts Discussed in Thread: TPS55340 Hi, Can I use LM2621 boost driver with external NMOS will be in between boost ground to power ground. The main reason to use MOSFET between boost ground to power ground is to protect boost c…

  • LM2621: Feed forward capacitor

    TI Thinks Resolved
    Part Number: LM2621 To whom it may concern, I am using the LM2621 as a 5V boost converter to power another ldo regulator to 3.3V.I am having an issue with CF1 or known as the feed forward capacitor. When I do not use a feedforward capacitor I am receiving…

  • LM2621: Increasing the Output current of Step-Up Boost IC (*Parallel Arragement)

    TI Thinks Resolved
    Part Number: LM2621 Other Parts Discussed in Thread: TPS61022 Dear Sir, Present we are using only single LM2621 dc boost IC, the design is to give output of 5v /500mA for Input range of 1.8 to 3.6v. Fir: Our Boost circuit We want to increase the output…

  • LM2621: Simplest SEPIC schematic for low VIN (1.2 - 4.5) with VOUT 3.3

    TI Thinks Resolved
    Part Number: LM2621 Other Parts Discussed in Thread: TPS63802 I am trying to design the simplest schematic for the LM2621 in a SEPIC configuration to run off of 3x 1.5v batteries. I need a fixed 3.3v out. The batteries will start at 4.5v and I want to…

  • LM2621: Clarification with input and output capacitors

    TI Thinks Resolved
    Part Number: LM2621 Other Parts Discussed in Thread: LMR62014 , TPS61175 , TPS61089 , TPS61378-Q1 Hi Team, We would like to ask for your assistance to the customer's inquiries below. We are looking at the LM2621 as an option for a booster converter.…

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