• ADM1270 FET gate details and misc

    Some details I can't seem to find out about the ADM1270.

    Is the P fet driven linearly or not?  Its not super clear in the datasheet how current limiting is accomplished.

    What should be done with the RPFG pin if not used?

    Also, am I missing something…

  • RE: ADM1270 for 15A sense

    Thank you, I was unclear if this was directed in some way to the soa power up calculations.

  • Current limit set in ADM1270


    I am using ADM1270ACPZ-R7 hotswap.

    My requirement is to set current limit to 500mA.

    So, from datasheet, I am using adjustable current limit formula.

    I have used resister divider to set Viset to 800mV.

    My Vsense is 20mV.

    Iset =500mA.

    At Foldback(FLB…

  • ADM1270 - PCB constraints


    Can you provide the PCB contraints for ADM1270 Hotswap controller IC since there is no information in datasheet regarding the PCB design guidelines. Can you also provide where we can find Layout guidelines for AD devices


    Abishek V

  • Adm1270 operation in negative temperatures

    Dear Sir, 

    In negative temperatures from -5 to -40 deg adm1270 is delaying to generate the gate voltage to p mosfet. So response is very slow. 

    Circuit schematic was shared in earlier communication. 

    Response time is 3 minute

  • ADM1270


    I want to limit the current using foldback function only. What I need to know is how to calculate the knee of the foldback current and the short circuit current.

    My application is for 1 Amp @ 45V. Also, I didn't clearly understand exactly how to calculate…

  • ADM1270 transient protecion

    On the ADM1270 evaluation board I am testing the protection for Vin min = 48V, Vin max = 56V. Is it good enough protection for IC if I solder SMAJ58CA on TVS D1 sites.

  • ADM1270 absolute maximum ratings

    ADM1270 maximum ratings are listed below:

    at UV, OV and FLB pin are limited to 6V, But if I look at the demo board schematic, when the input voltage is 60V, the UV pin is 6.9V.

    Is this condition allowed?

    Are there internal clamping diodes on pins?

  • RE: About ADM1270 ADISimPower Tool

    Dear AD,

    Further to this discussion:

    I used your "ADM1270 Design Spreadsheet tool", but it is limited for practical design, because I cannot change the R-values and see the resulting voltages.

    Currently voltage settings can be selected and…

  • RE: ADM1270 Design Question

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,