AP64501

Document number: DS41980 Rev. 4 - 2

21 of 26

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August 2019

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AP64501

Application Information (cont.)

16

External Loop Compensation Design (cont.)

From Eq. 17, the value of R5 is calculated as:

Choose a standard resistor value for R5 close to its calculated value. For example, choose R5 to be 15.8k

.

From Eq. 18, C5 is calculated as:

Choose a standard capacitor value for C5 close to its calculated value. For example, choose C5 to be 2.7nF.

From Eq. 19, C6 is calculated as:

(

)

(

)

C6 is optional. If used, choose a standard capacitor value for C6 close to its calculated value. For example, choose C6 to be 33pF.

From Eq. 20, the approximate range of C4 is calculated as:

[

]

[

]

C4 is optional. If used, choose a standard capacitor value for C4 that is close to its calculated range. For example, choose C4 to be 47pF.