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A6986 Fiches technique(PDF) 41 Page - STMicroelectronics

No de pièce A6986
Description  38 V, 2 A synchronous step-down switching regulator with 30 µA quiescent current
PDF  67 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

A6986 Fiches technique(HTML) 41 Page - STMicroelectronics

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A6986
Closing the loop
67
Figure 28. Phase plot
The blue solid trace represents the transfer function including the sampling effect term (see
Equation 22 on page 36), the dotted blue trace neglects the contribution.
6.5
Compensation network design
The maximum bandwidth of the system can be designed up to fSW/6 to guarantee a valid
small signal model.
Equation 33
Equation 34
where:
Equation 35
BW
fSW
6
---------
=
RC
2
 BW C
OUT VOUT

0.85V gCS gm TYP

----------------------------------------------------------------
=
fPOLE
p
2
-----------
=



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