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R6986 Fiches technique(PDF) 17 Page - STMicroelectronics

No de pièce R6986
Description  38 V, 2 A synchronous step-down switching regulator
PDF  62 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

R6986 Fiches technique(HTML) 17 Page - STMicroelectronics

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DocID026996 Rev 2
17/62
R6986
Functional description
62
Figure 5. Soft-start phase
The CSS is dimensioned accordingly with Equation 1:
Equation 1
where TSS is the soft-start time, ISS CH the charging current and VFB the reference of the
error amplifier.
The soft-start block supports the precharged output capacitor.
CSS
SSGAIN
ISSCH TSS
VFB
--------------------------------
3
4
AT
SS
0.85V
---------------------------
==



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