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LMR16030: the ouput capacitance of LMR16030

user4856666
Prodigy 70 points
Part Number: LMR16030

Can we use 22uF CHIP CAP+100nF CHIP CAP+220uF DIP E.CAP for the output capactitances of LMR16030?

1, in datasheet of LMR16030，the output capactitance is recommended as 2x47uF CHIP CAP or 1x100uF E.CAP.

According to our actual  ccmponents( inductor is 10uH 10%). Online design, the output capactitance is recommended as 2x68uF CHIP CAP or 2x82uF E.CAP.

2, According to our actual  ccmponents and cost. Can we use the in the schematic diagram 22uF CHIP CAP+100nF CHIP CAP+220uF DIP E.CAP?

In the range 18~30VAC of the supply voltage of the product,  the output voltage is normal and the ripple is small.


 Electron Loading 0~2A, the output voltage is normal and the ripple is about 50mV or less then 50mV.

18VAC

24VAC

30VAC

  • TI__Guru 73605 points

    Hello

    I think that you choice of output capacitor should be OK.

    You should test the load transient response of your 5Vout and make sure that it looks stable.

    You can make adjustments in the value of C10 in order to optimize your load transient response.

    Taking a Bode plot of the loop is also a good idea, if you have that capability.

    Thanks