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No -5V Output ?

Category: Hardware
Product Number: LTC1983

Hello

Please help to fix the problem of Part Number ( LTC1983ES6-5#TRPBF ).

Input = 5V - OK.

Output has not short.

replaced the IC to a new one and the same problem occurs.

the output measuring is 0.5V and NOT -5V as needed.

attached the schematic...

  • Hello,

    Is the only place the output goes shown on the schematic? I do not see anything obvious with the schematic. Is it possible to get a scope shot of the C+ node? 

    What happens if you reduce C73 to 1uF? I would expect 4.7uF to be OK but I do not see anything else obvious. 

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