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L6986 Datasheet(PDF) 16 Page - STMicroelectronics

Part # L6986
Description  38 V, 2 A synchronous step-down switching regulator with 30 A quiescent current
PDF  68 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6986 Datasheet(HTML) 16 Page - STMicroelectronics

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Functional description
L6986
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DocID025376 Rev 7
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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