NCP5318 ON Semiconductor, NCP5318 Datasheet - Page 26

• Manufacturer Part Number: NCP5318
• Description: Two/Three/Four-Phase Buck CPU Controller
• Manufacturer: ON Semiconductor

8. Adaptive Voltage Positioning
(AVP): R
Two resistors program the Adaptive Voltage Positioning
FB
and R
DRP
. These components form a resistor
L1
I
Lx
I
MAX
MAX
L1
0 A
Lx
0 A
/n
/n
R
R
CS1
CSx
R
R
C
V
C
CS1
CSx
CORE
CS1
CSx
C
C
CS1
CSx
= VID − 19 mV − I
= VID − 19 mV − I
CS1N
CSxN
CS1P
CSxP
Figure 29. AVP Circuitry at Full−Load
Figure 28. AVP Circuitry at No−Load
CS1N
CSxN
CS1P
CSxP
V
CORE
+
−
+
−
G
G
VDRP
VDRP
= VID − 19 mV + IBIAS
+
−
+
−
G
G
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MAX
VDRP
VDRP
DRP
w R
S
V
V
I
MAX
DRP
w R
DRP
L
S
26
w G
FB
I
I
• R
DRP
FB
= VID − 19 mV
= VID − 19 mV +
VDRP
divider, shown in Figures 28 and 29, between V
and V
COMP
= I
L
I
DRP
= I
• G
I
DRP
DRP
COMP
R
MAX
w R
DRP
VDRP
Error
OUT
Amp
R
VFB
= 0
FB
DRP
• R
V
Error
Amp
/R
FB
.
+
−
w R
L
DRP
V
= VID − 19 mV V
• G
+
−
FB
FB
VID − 19 mV
VDRP
= VID − 19 mV V
R
VID − 19 mV
+ −
/R
I
FB
FB
I
DRP
FB
R
+ −
FB
= 0
CORE
CORE
DRP
, V
FB
,