LMZM23600: lmzm23600

or kinzler

Part Number: LMZM23600

i'm designing a 5V to -4V converter.

i'm running the pspice adjustable model - downloaded from TI.

feedback resistors are 75k (FB to VOUT) and 25k (FB to VOUT_IBB)

when running simulation voltage is -12V and then climbing to -4V.

that is a problem because FB to GND start from 8V (Absolute max rating is 5V)

Please assist

Thanks

0 or kinzler over 3 years ago

Hi please reply

0 Jimmy Hua over 3 years ago in reply to or kinzler

Hi,

Can you show me your schematic that you simulated with? When you are referring to GND is this GND of the module pin or is it in your schematic?

If you are configuring the LMZM23600 for IBB topology, the system return (GND pin) is now VOUT_IBB.

The absolute maximum rating in the datasheet refers to FB to system return (GND pin).

For more information on IBB, please refer to this app note.

Regards,

Jimmy

0 or kinzler over 3 years ago in reply to Jimmy Hua

0 or kinzler over 3 years ago in reply to or kinzler

can you see the schematic?

0 or kinzler over 3 years ago in reply to or kinzler

i'm trying to post schematic but it says : "duplicate post"

0 or kinzler over 3 years ago in reply to or kinzler

0 or kinzler over 3 years ago in reply to or kinzler

0 Jimmy Hua over 3 years ago in reply to or kinzler

Hi Or,

You responded to be offline about this topic. I'll close this thread and continue the discussion offline with you.

If you haven't already done so, you can try using the WEBENCH Designer tool for simulation purposes.

Regards,

Jimmy

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