Hi Dmitrijs, Sorry to hear that you are having problems. Output impedance of LM96550 : The output impedance is shown in the datasheet (Output ON Resistance) as 7 to 11 ohm. Malfunction of LM96550 : Did you make sure that you followed the instructions circled below? If you switch to the LM96551 , you would be able to use less number of power supplies. BTW, your attachments / pictures did not come through! Regards, Hooman
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