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TPS56520 maximum output capacitor value

K. Sasaki14
Guru 10200 points
Other Parts Discussed in Thread: TPS56520

On the TPS56520 datasheet P.25, there is recommended capacitor value 44uF to 100uF.
What value can we increase output capacitor value up to? Finally we ask our customer to confirm operation with their board, thus we would like to get reference value.

Best Regards,
Kohei Sasaki

  • 0
    TI__Guru**** 191445 points
    TPS56520 uses DCAP2 control. It is designed to operate with small values of low ESR ceramic output capacitors while still maintaining excellent transient response. The TPS56520 has been characterized to operate well over the range of 44 (2 x 22uF) to 100uF of output capacitance. We have not tested it above that range. I can tell you from experience with similar devices, that you can usually go up to 220 uF without issue, but I would advise that you measure the loop response carefully if you go above the recommended range. Generally speaking you will see the loop bandwidth and phase margin decrease with higher output capacitance.