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  • LM2623: start up voltage

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    Part Number: LM2623 Other Parts Discussed in Thread: TPS61021A Hello My customer is finding out the boost converter solution (FY18 portable medical) for: Vin=0.9~1.5V (Alkaline x 1) Vout=1.8V Io>0.1A~ One candidate is LM2623 , but I have two concerns…
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    • Answered

  • LM2623: LM2623ALD - About behavior when VDD is less than 0.8V(VIN_OP)

    Resolved
    Part Number: LM2623 Hi Team, Our customer would like to know the behavior of LM2623ALD when VDD is less than 0.8V(VIN_OP). Could you please let us know if you have any information? [Q1] If VDD is less than 0.8V(VIN_OP), Does this device stop switching…
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  • RE: LM2623: LM2623ALD - About output capacitor

    Hi Youhao-san, Thank you for the information. I have three questions. [Q1] I understand that this device starts the switching when the output voltage reaches the threshold (higher than VOUT * 0.6%(TYP)). Could you please let us know…
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  • LM2623: Voltage collapse during 200mA valve pulse

    Resolved
    Part Number: LM2623 Hello, i am having an issue with the LM2623A stepup converter. The aim is to drive a magnetiv valve from two AA Alkaline cells. The valve has 33Ohm a current of 200mA is necessary, therfore a voltage of 6,6V is necessary. The circuit…
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  • RE: LM2623 as buck-boost?

    The LM2623 should work in this application; although I do not know of anyone who has tested it. Be careful about the maximum input voltage on the gate of Q1. The abs max on the LM2623 EN pin is 10V; so it can be connected to Vin if that restriction is…
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  • LM2623 Output Current and Efficiency

    Resolved
    Other Parts Discussed in Thread: LM2623 , LM2621 , LM2665 , TPS60141 , LM2700 Two questions on the LM2623: System requirements: Input source = 2AA batteries in series. --- Output = 7.5V, 5mA Max. Q1) I ran through the design calculations and used the on line…
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