LP5907: What is the reason for 10uF maximum output capacitance?

Colin Brock

Part Number: LP5907

I'm curious as to the reason for the specified 10uF output capacitance limit. Is this really a stability issue, or just the range of capacitance that was used for design simulations? I'd like to use 2 x 10uF 6.3uF X5R caps on the 1.8V output. Under bias the capacitance will be less than 20uF, but likely more than 10uF. Please advise on what problems might be seen or if I'm in the clear.

over 7 years ago

0 Colin Brock over 7 years ago

Prodigy 30 points

0 Ryan Eslinger over 7 years ago in reply to Colin Brock

TI__Guru 55940 points

Hi Colin,

The limitation on capacitance is truly for stability. Is it your load that is requiring the additional capacitance on the LP5907 output rail? If so, could you share your input rail and any other requirements you have for the LDO so we can help suggest an LDO that can accept a larger output capacitance? If the output capacitance is not being driven by the load, please limit the output capacitance to 10 uF.

Very Respectfully,
Ryan

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LP5907: What is the reason for 10uF maximum output capacitance?