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L6718 Datasheet(PDF) 54 Page - STMicroelectronics

Part # L6718
Description  SMBus interface for power management
PDF  71 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6718 Datasheet(HTML) 54 Page - STMicroelectronics

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Output voltage positioning
L6718
54/71
DocID023399 Rev 3
Equation 9
where
ΔVosc is the PWM ramp and kV the gain for the voltage loop (see Figure 12).
During a DVID transition, the REF pin moves according to the command issued
(SetVIDFast, SetVIDSlow); the current requested to charge/discharge the RREF/CREF
network is mirrored and added to the droop current compensating for over/undershoot on
the regulated voltage.
If Jmode is enabled by CONFIG1 pinstrapping the SREF/JEN is set as the single-phase rail
enable.
Figure 12. DVID optimization circuit
C
REF
C
F
1
ΔV
OSC
k
V
V
IN
⋅
----------------------
–
⎝⎠
⎛⎞
⋅
=
R
REF
R
F
C
F
⋅
C
REF
----------------------
=
Ref
REF
RREF
CREF
Ref
COMP
RF
CF
RFB
ZF(s)
ZFB(s)
VID
to Vout...
RGND
AM12886v1



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