MP5077 input and output capacitors

DC-DC Power Converters
1

Hi team,

I plan to use MP5077 load switch with a current limit of1.15A.

Should I use :

  • 2x22µF on the VIN pin
  • 2x22µF on the Vout pin

As described in typical application schematic, or low-value capacitors allowed??

Are there any recommended minimum values for input and output capacitors when the load switch is confirgured with a “small” current limitation (1.15A)?

Thanks.

Best Regards.

Sylvain

2

Hello Sylvain,

This is a schematic of the typical application from the MP5077 datasheet, which is perfectly fine to use:

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I suppose you can use lower value capacitors in place of the 22uF ones at the input/output, but it is important to test and see if the ripple at the input/output is acceptable for your application.

3

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It looks like the lowest current limit that can be adjusted here comes to almost 1.5A or less. Although you could perhaps get away with 1.15A with ~55kOhms - 57kOhms, but this should be tested before implemented.