LTC3719 LINER [Linear Technology], LTC3719 Datasheet - Page 10

• Manufacturer Part Number: LTC3719
• Description: 2-Phase, High Efficiency, Step-Down Controller for AMD Opteron CPUs
• Manufacturer: LINER [Linear Technology]

FU CTIO AL DIAGRA
LTC3719
10
f
IN
DIFFOUT
U
V
V
OS
OS
R
–
+
C
5V
+
LP
LP
ATTENOUT
PLLFLTR
ATTENIN
NO_CPU
EXTV
PGOOD
INTV
PLLIN
SGND
FCB
V
IN
CC
0.18 A
CC
50k
U
40k
40k
10k
3V
OSCILLATOR
4.8V
PHASE DET
0.60V
4.5V
R1
+
–
–
+
+
–
–
+
40k
40k
CLK1
CLK2
TO SECOND
CHANNEL
–
+
–
+
A1
INTERNAL
SUPPLY
V
LDO
REG
5V
REF
0.66V
EAIN
0.54V
FCB
VID0
W
VID1
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
5-BIT VID DECODER
VID2
6V
1.2 A
VID3
0.86V
5V
SLOPE
FB
COMP
VID4
I
S
R
1
0.55V
–
+
Q
Q
–
TYPICAL ALL
40k
DROP
VID PINS
OUT
DET
+
45k
–
+
B
SHDN
5V
+
RST
FB
BOT
V
TOP ON
–
BIAS
SHDN
FCB
START
SOFT-
45k
RUN
OV
–
+
2.4V
EA
I
2
SWITCH
–
+
+
–
LOGIC
V
FB
0.60V
0.66V
TOP
BOT
INTV
CC
INTV
30k
30k
CC
SENSE
SENSE
RUN/SS
BOOST
PGND
EAIN
SW
TG
BG
I
TH
+
–
INTV
CC
C
C
D
C2
C
C
B
B
L
C
R
SS
C
3
V
1
IN
R
SENSE
D1
+
2
4
C
IN
sn3719 3719fs