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Some issues about MAX20040

Category: Hardware
Product Number: MAX20040DATPA/VY+T

Hi,

     I meet some issues about MAX20040, please help me!

     first,  set input vol to 8~16V and output vol = 12v,

  • Is there a problem with the schematic?

    second, I find some question when I do some tests, why I set the EN low, the voltage of out is 2.4V ? and the current of standby is 30mA around?pls help me,millions of thanks~~
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  • I have same problem with standby current... Datasheet define "Standby Supply Current" to ~52 uA in Skip mode. Skip Mode is not available in all part-numbers and... it works good with 5 Vout, but not with 9 Vout or 12 Vout. Input voltage has no impact to quiescient power.

    ~22 mA standby current for 5 Vin and 12 Vout

    ~10 mA standby current for 12 Vin and 12 Vout

    ~9 mA standby current for 15 Vin and 12 Vout

    But... it looks good with 5 Vout.

    Could someone confirm this issue?

    Quiescient current is not defined for voltage other than 5 V. Where is the ragne? Where are volt-ampere characteristics for quiescient current related to output voltage?

    Thanks

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  • I have same problem with standby current... Datasheet define "Standby Supply Current" to ~52 uA in Skip mode. Skip Mode is not available in all part-numbers and... it works good with 5 Vout, but not with 9 Vout or 12 Vout. Input voltage has no impact to quiescient power.

    ~22 mA standby current for 5 Vin and 12 Vout

    ~10 mA standby current for 12 Vin and 12 Vout

    ~9 mA standby current for 15 Vin and 12 Vout

    But... it looks good with 5 Vout.

    Could someone confirm this issue?

    Quiescient current is not defined for voltage other than 5 V. Where is the ragne? Where are volt-ampere characteristics for quiescient current related to output voltage?

    Thanks

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